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Lasik One Eye for Reading One Eye for Distance Visiin

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For the drug used for hypertension, see Lasix. For the Slovakian footballer, see Richard Lásik.

Corrective ophthalmological surgery

LASIK
US Navy 070501-N-5319A-007 Capt. Joseph Pasternak, an ophthalmology surgeon at National Naval Medical Center Bethesda, lines up the laser on Marine Corps Lt. Col. Lawrence Ryder's eye before beginning LASIK IntraLase surgery.jpg

LASIK surgery using an excimer light amplification by stimulated emission of radiation at US National Naval Medical Center Bethesda
Specialty Ophthalmology, optometry
ICD-9-CM 11.71
MeSH D020731
MedlinePlus 007018

[edit on Wikidata]

LASIK or Lasik (laser-assisted in situ keratomileusis), commonly referred to equally light amplification by stimulated emission of radiation eye surgery or laser vision correction, is a type of refractive surgery for the correction of myopia, hyperopia, and an bodily cure for astigmatism, since it is in the cornea.[1] LASIK surgery is performed by an ophthalmologist who uses a laser or microkeratome to reshape the eye'due south cornea in lodge to improve visual acuity.[ii] For most people, LASIK provides a long-lasting alternative to eyeglasses or contact lenses.[3]

LASIK is most like to another surgical cosmetic procedure, photorefractive keratectomy (PRK), and LASEK. All represent advances over radial keratotomy in the surgical handling of refractive errors of vision. For patients with moderate to loftier myopia or thin corneas which cannot exist treated with LASIK and PRK, the phakic intraocular lens is an alternative.[four] [5] As of 2018, roughly 9.5 one thousand thousand Americans have had LASIK[1] [6] and, globally, betwixt 1991 and 2016, more than 40 one thousand thousand procedures were performed.[7] [eight] Notwithstanding, the procedure seems to exist a declining option for many in recent years.[9]

Effectiveness [edit]

In 2006, the British National Health Service'south National Plant for Health and Clinical Excellence (Prissy) considered evidence of the effectiveness and the potential risks of the laser surgery stating "electric current evidence suggests that photorefractive (laser) surgery for the correction of refractive errors is safe and effective for utilise in accordingly selected patients. Clinicians undertaking photorefractive (laser) surgery for the correction of refractive errors should ensure that patients sympathise the benefits and potential risks of the procedure. Risks include failure to achieve the expected improvement in unaided vision, development of new visual disturbances, corneal infection and flap complications. These risks should be weighed against those of wearing spectacles or contact lenses."[10] The FDA reports "The safety and effectiveness of refractive procedures has non been determined in patients with some diseases."[11]

Satisfaction [edit]

Surveys of LASIK surgery discover rates of patient satisfaction between 92 and 98 pct.[12] [13] [14] In March 2008, the American Gild of Cataract and Refractive Surgery published a patient satisfaction meta-analysis of over 3,000 peer-reviewed articles from international clinical journals. Data from a systematic literature review conducted from 1988 to 2008, consisting of 309 peer-reviewed articles about "properly conducted, well-designed, randomized clinical trials" found a 95.4 pct patient satisfaction rate amidst LASIK patients.[xv]

A 2022 JAMA written report claims that overall, preoperative symptoms decreased significantly, and visual acuity excelled. A meta-analysis discovered that 97% of patients achieved uncorrected visual vigil (UCVA) of twenty/twoscore, while 62% accomplished 20/xx.[16] The increase in visual acuity allows individuals to enter occupations that were previously not an selection due to their vision.[ citation needed ]

Dissatisfaction [edit]

Some people with poor outcomes from LASIK surgical procedures report a significantly reduced quality of life considering of vision problems or physical pain associated with the surgery.[1] A pocket-sized percentage of patients may need to have some other surgery because their condition is over- or under-corrected. Some patients need to habiliment contact lenses or glasses even after treatment.[17]

The near common reason for dissatisfaction in LASIK patients is chronic severe dry out eye. Contained research indicates 95% of patients feel dry eye in the initial postal service-operative menses. This number has been reported to up to sixty% after i calendar month. Symptoms begin to improve in the vast majority of patients in the vi to 12 months following the surgery.[18] However, 30% of mail-LASIK referrals to 3rd ophthalmology care centers have been shown to be due to chronic dry heart.[19] [20]

Morris Waxler, a erstwhile FDA official who was involved in the approval of LASIK, has subsequently criticized its widespread apply. In 2010, Waxler made media appearances and claimed that the procedure had a failure rate greater than 50%. The FDA responded that Waxler's information was "filled with imitation statements, incorrect citations" and "mischaracterization of results".[21]

A 2022 JAMA study indicates that the prevalence of complications from LASIK are higher than indicated, with the report indicating many patients experience glare, halos or other visual symptoms.[22] Forty-iii percent of participants in a JAMA study (published in 2017) reported new visual symptoms they had non experienced before.

Presbyopia [edit]

A type of LASIK, known as presbyLasik, may be used in presbyopia. Results are, however, more than variable and some people have a decrease in visual acuity.[23]

Risks [edit]

College-order aberrations [edit]

Higher-order aberrations are visual problems that require special testing for diagnosis and are not corrected with normal spectacles (eyeglasses). These aberrations include 'starbursts', 'ghosting', 'halos' and others.[ane] [24] Some patients describe these symptoms post-operatively and associate them with the LASIK technique including the formation of the flap and the tissue ablation.[25]

At that place is a correlation between pupil size and aberrations. This correlation may be the result of irregularity in the corneal tissue between the untouched part of the cornea and the reshaped part. Daytime post-LASIK vision is optimal, since the pupil size is smaller than the LASIK flap.[ citation needed ]

Others propose that higher-gild aberrations are nowadays preoperatively.[26] They can be measured in micrometers (µm) whereas the smallest laser-beam size approved by the FDA is about one thousand times larger, at 0.65 mm. In situ keratomileusis effected at a later historic period increases the incidence of corneal higher-order wavefront aberrations.[27] [28] These factors demonstrate the importance of careful patient option for LASIK treatment.

Dry eyes [edit]

95% of patients written report dry-eye symptoms after LASIK.[i] [29] Although information technology is usually temporary, information technology can develop into chronic and astringent dry heart syndrome. Quality of life can exist severely affected by dry out-eye syndrome.[30]

Underlying conditions with dry eye such as Sjögren'southward syndrome are considered contraindications to Lasik.[31]

Treatments include bogus tears, prescription tears, and punctal occlusion. Punctal occlusion is achieved past placing a collagen or silicone plug in the tear duct, which normally drains fluid from the eye. Some patients complain of ongoing dry-eye symptoms despite such treatments and dry-eye symptoms may be permanent.[32]

Halos [edit]

Some post-LASIK patients see halos and starbursts around bright lights at dark.[1] At dark, the pupil may dilate to be larger than the flap leading to the edge of the flap or stromal changes causing visual distortion of light that does not occur during the day when the pupil is smaller. The optics tin be examined for large pupils pre-operatively and the hazard of this symptom assessed.[ citation needed ]

Complications due to LASIK have been classified as those that occur due to preoperative, intraoperative, early postoperative, or late postoperative sources:[33] Co-ordinate to the UK National Wellness Service complications occur in fewer than v% of cases.[29]

Other complications [edit]

  • Flap complications – The incidence of flap complications is about 0.244%.[34] Flap complications (such as displaced flaps or folds in the flaps that necessitate repositioning, diffuse lamellar keratitis, and epithelial ingrowth) are common in lamellar corneal surgeries[35] only rarely pb to permanent loss of visual vigil. The incidence of these microkeratome-related complications decreases with increased physician experience.[36]
  • Slipped flap – is a corneal flap that detaches from the rest of the cornea. The chances of this are greatest immediately after surgery, so patients typically are advised to get dwelling and slumber to allow the flap adhere and heal. Patients are usually given slumber goggles or center shields to wear for several nights to foreclose them from dislodging the flap in their sleep. A curt functioning time may decrease the chance of this complication, as there is less time for the flap to dry.[ citation needed ]
  • Flap interface particles – are a finding whose clinical significance is undetermined.[37] Particles of various sizes and reflectivity are clinically visible in about 38.seven% of optics examined via slit lamp biomicroscopy and in 100% of optics examined by confocal microscopy.[37]
  • Diffuse lamellar keratitis  – an inflammatory process that involves an accumulation of white blood cells at the interface between the LASIK corneal flap and the underlying stroma. It is known colloquially every bit "sands of Sahara syndrome" because on slit lamp test, the inflammatory infiltrate appears similar to waves of sand. The USAeyes organization reports an incidence of 2.iii% later LASIK.[38] It is most usually treated with steroid centre drops. Sometimes it is necessary for the centre surgeon to lift the flap and manually remove the accumulated cells. DLK has non been reported with photorefractive keratectomy due to the absence of flap creation.
  • Infection – the incidence of infection responsive to treatment has been estimated at 0.04%.[38]
  • Post-LASIK corneal ectasia – a condition where the cornea starts to bulge frontward at a variable time after LASIK, causing irregular astigmatism. the condition is like to keratoconus.
  • Subconjunctival hemorrhage – A report shows the incidence of subconjunctival hemorrhage has been estimated at 10.five%.[38] [39]
  • Corneal scarring – or permanent bug with cornea's shape making it impossible to clothing contact lenses.[17]
  • Epithelial ingrowth – estimated at 0.01%.[38]
  • Traumatic flap dislocations – Cases of belatedly traumatic flap dislocations accept been reported upward to thirteen years after LASIK.[forty]
  • Retinal detachment: estimated at 0.36 percentage.[41]
  • Choroidal neovascularization: estimated at 0.33 percent.[41]
  • Uveitis: estimated at 0.18 pct.[42]
  • For climbers – Although the cornea unremarkably is thinner after LASIK, because of the removal of part of the stroma, refractive surgeons strive to maintain the maximum thickness to avoid structurally weakening the cornea. Decreased atmospheric pressure level at higher altitudes has non been demonstrated as extremely dangerous to the eyes of LASIK patients. Yet, some mount climbers accept experienced a myopic shift at extreme altitudes.[43] [44]
  • Tardily postoperative complications – A big trunk of show on the chances of long-term complications is not however established and may be changing due to advances in operator experience, instruments and techniques.[45] [46] [47] [48]
  • Potential best vision loss may occur a yr after the surgery regardless of the use of eyewear.[49]
  • Eye floaters – ocular mechanical stress created by LASIK have the potential to damage the vitreous, retina, and macula causing floaters as a consequence.
  • Ocular neuropathic hurting (corneal neuralgia); rare[50]

FDA's position [edit]

In October 2009, the FDA, the National Middle Institute (NEI), and the Department of Defence force (DoD) launched the LASIK Quality of Life Collaboration Project (LQOLCP) to help better understand the potential risk of severe bug that can result from LASIK[51] in response to widespread reports of problems experienced by patients after LASIK laser eye surgery.[52] This project examined patient-reported outcomes with LASIK (PROWL). The project consisted of three phases: pilot phase, phase I, stage II (PROWL-i) and stage Iii (Prowl-2).[53] The final two phases were completed in 2014.

The results of the LASIK Quality of Life Report were published in October 2014.[51]

Based on our initial analyses of our studies:

  • Up to 46 pct of participants, who had no visual symptoms before surgery, reported at least 1 visual symptom at 3 months after surgery.
  • Participants who adult new visual symptoms after surgery, well-nigh often developed halos. Up to 40 percent of participants with no halos before LASIK had halos 3 months following surgery.
  • Upwardly to 28 per centum of participants with no symptoms of dry optics earlier LASIK, reported dry eye symptoms at 3 months after their surgery.
  • Less than 1 percent of report participants experienced "a lot of" difficulty with or disability to exercise usual activities without corrective lenses because of their visual symptoms (halos, glare, et al.) later on LASIK surgery.
  • Participants who were not satisfied with the LASIK surgery reported all types of visual symptoms the questionnaire measured (double vision/ghosting, starbursts, glare, and halos).

The FDA's director of the Division of Ophthalmic Devices, said well-nigh the LASIK study "Given the big number of patients undergoing LASIK annually, dissatisfaction and disabling symptoms may occur in a meaning number of patients".[54] As well in 2014, FDA published an article highlighting the risks and a list of factors and conditions individuals should consider when choosing a doctor for their refractive surgery.[55]

Contraindications [edit]

Not everyone is eligible to receive LASIK. Severe keratoconus or sparse corneas may disqualify patients from LASIK, though other procedures may exist viable options. Those with Fuchs' corneal endothelial dystrophy, corneal epithelial basement membrane dystrophy, retinal tears, autoimmune diseases, severe dry eyes, and significant blepharitis should be treated before consideration for LASIK. Women who are pregnant or nursing are mostly not eligible to undergo LASIK.[56]

Large Pupils: These can crusade symptoms such equally glare, halos, starbursts, and ghost images (double vision) later on surgery. Considering the light amplification by stimulated emission of radiation can simply work a department of the centre, the outer ring of the center is left uncorrected. At night or when night, a patient'southward eyes amplify and thus the uncorrected outer section of the eye and the inner corrected section, create the issues.[57]

Process [edit]

The planning and analysis of corneal reshaping techniques such as LASIK have been standardized by the American National Standards Constitute, an approach based on the Alpins method of astigmatism analysis. The FDA website on LASIK states,

"Earlier undergoing a refractive process, yous should carefully weigh the risks and benefits based on your own personal value arrangement, and try to avoid being influenced by friends that have had the procedure or doctors encouraging y'all to do so."[58]

The procedure involves creating a thin flap on the eye, folding it to enable remodeling of the tissue below with a laser and repositioning the flap.

Preoperative procedures [edit]

Contact lenses [edit]

Patients wearing soft contact lenses are instructed to stop wearing them v to 21 days earlier surgery. One manufacture body recommends that patients wearing difficult contact lenses should stop wearing them for a minimum of 6 weeks plus another half dozen weeks for every three years the hard contacts have been worn. The cornea is avascular because it must exist transparent to part normally. Its cells absorb oxygen from the tear movie. Thus, depression-oxygen-permeable contact lenses reduce the cornea'south oxygen assimilation, sometimes resulting in corneal neovascularization—the growth of blood vessels into the cornea. This causes a slight lengthening of inflammation duration and healing time and some pain during surgery, considering of greater bleeding. Although some contact lenses (notably modern RGP and soft silicone hydrogel lenses) are made of materials with greater oxygen permeability that assistance reduce the risk of corneal neovascularization, patients because LASIK are warned to avoid over-wearing their contact lenses.[ commendation needed ]

Pre-operative test and educational activity [edit]

In the United States, the FDA has approved LASIK for age 18 or 22 and over because the vision has to stabilize. More chiefly the patient'due south eye prescription should be stable for at least one yr prior to surgery. The patient may exist examined with pupillary dilation and education given prior to the procedure. Before the surgery, the patient's corneas are examined with a pachymeter to make up one's mind their thickness, and with a topographer, or corneal topography machine,[ii] to measure their surface contour. Using depression-power lasers, a topographer creates a topographic map of the cornea. The process is contraindicated if the topographer finds difficulties such as keratoconus[two] The preparatory process too detects astigmatism and other irregularities in the shape of the cornea. Using this information, the surgeon calculates the amount and the location of corneal tissue to be removed. The patient is prescribed and self-administers an antibiotic beforehand to minimize the gamble of infection after the process and is sometimes offered a curt acting oral allaying medication every bit a pre-medication. Prior to the procedure, anaesthetic eye drops are instilled. Factors that may dominion out LASIK for some patients include big pupils, thin corneas and extremely dry eyes.[59]

Operative process [edit]

Flap creation [edit]

Flap creation with femtosecond laser

Flaporhexis as an culling method to elevator a femtosecond laser flap

A soft corneal suction ring is applied to the center, holding the eye in place. This step in the procedure tin can sometimes cause small claret vessels to burst, resulting in bleeding or subconjunctival hemorrhage into the white (sclera) of the middle, a harmless side consequence that resolves within several weeks. Increased suction causes a transient dimming of vision in the treated eye. Once the eye is immobilized, a flap is created past cutting through the corneal epithelium and Bowman's layer. This process is accomplished with a mechanical microkeratome using a metal bract, or a femtosecond laser that creates a series of tiny closely bundled bubbles within the cornea. A hinge is left at 1 end of this flap. The flap is folded back, revealing the stroma, the middle section of the cornea. The process of lifting and folding back the flap can sometimes be uncomfortable.[ citation needed ]

Laser remodeling [edit]

The second step of the process uses an excimer laser (193 nm) to remodel the corneal stroma. The laser vaporizes the tissue in a finely controlled mode without damaging the adjacent stroma. No burning with heat or actual cutting is required to ablate the tissue. The layers of tissue removed are tens of micrometers thick.[ citation needed ]

Performing the light amplification by stimulated emission of radiation ablation in the deeper corneal stroma provides for more than rapid visual recovery and less hurting than the earlier technique, photorefractive keratectomy (PRK).[60]

During the second step, the patient's vision becomes blurry, once the flap is lifted. They will exist able to run into only white low-cal surrounding the orange calorie-free of the laser, which can pb to balmy disorientation. The excimer laser uses an heart tracking system that follows the patient's center position upwardly to four,000 times per second, redirecting laser pulses for precise placement within the treatment zone. Typical pulses are around 1 millijoule (mJ) of pulse free energy in 10 to 20 nanoseconds.[61]

Repositioning of the flap [edit]

After the laser has reshaped the stromal layer, the LASIK flap is carefully repositioned over the treatment area by the surgeon and checked for the presence of air bubbling, debris, and proper fit on the centre. The flap remains in position by natural adhesion until healing is completed.

Postoperative care [edit]

Patients are normally given a course of antibiotic and anti-inflammatory eye drops. These are continued in the weeks post-obit surgery. Patients are told to residuum and are given night eyeglasses to protect their eyes from bright lights and occasionally protective goggles to prevent rubbing of the eyes when asleep and to reduce dry eyes. They also are required to moisturize the optics with preservative-free tears and follow directions for prescription drops. Occasionally after the process a bandage contact lens is placed to assist the healing, and typically removed after iii–iv days. Patients should exist fairly informed by their surgeons of the importance of proper post-operative intendance to minimize the adventure of complications.[62]

Wavefront-guided [edit]

Wavefront-guided LASIK is a variation of LASIK surgery in which, rather than applying a simple correction of only long/short-sightedness and astigmatism (but lower order aberrations equally in traditional LASIK), an ophthalmologist applies a spatially varying correction, guiding the computer-controlled excimer laser with measurements from a wavefront sensor. The goal is to achieve a more optically perfect eye, though the terminal result even so depends on the medico's success at predicting changes that occur during healing and other factors that may take to practise with the regularity/irregularity of the cornea and the axis of any rest astigmatism. Some other important factor is whether the excimer laser tin can correctly annals eye position in 3 dimensions, and to track the eye in all the possible directions of centre move. If a wavefront guided treatment is performed with less than perfect registration and tracking, pre-existing aberrations tin can be worsened. In older patients, scattering from microscopic particles (cataract or incipient cataract) may play a role that outweighs any benefit from wavefront correction.[63] [64] [65] [66]

When treating a patient with preexisting astigmatism, well-nigh wavefront-guided LASIK lasers are designed to care for regular astigmatism every bit determined externally past corneal topography. In patients who take an element of internally induced astigmatism, therefore, the wavefront-guided astigmatism correction may leave regular astigmatism behind (a cross-cylinder consequence). If the patient has preexisting irregular astigmatism, wavefront-guided approaches may go out both regular and irregular astigmatism backside. This tin can issue in less-than-optimal visual acuity compared with a wavefront-guided approach combined with vector planning, as shown in a 2008 study.[67] Thus, vector-planning offers a better alignment betwixt corneal astigmatism and light amplification by stimulated emission of radiation treatment, and leaves less regular astigmatism behind on the cornea, which is advantageous whether irregular astigmatism coexists or not.[ citation needed ]

The "leftover" astigmatism after a purely surface-guided laser correction can be calculated beforehand, and is called ocular residual astigmatism (ORA). ORA is a calculation of astigmatism due to the noncorneal surface (internal) optics. The purely refraction-based approach represented by wavefront assay actually conflicts with corneal surgical experience developed over many years.[66]

The pathway to "super vision" thus may require a more customized approach to corneal astigmatism than is usually attempted, and whatsoever remaining astigmatism ought to be regular (as opposed to irregular), which are both fundamental principles of vector planning overlooked by a purely wavefront-guided handling programme.[66] This was confirmed by the 2008 study mentioned in a higher place, which found a greater reduction in corneal astigmatism and better visual outcomes under mesopic weather using wavefront technology combined with vector analysis than using wavefront engineering science alone, and also plant equivalent college-order aberrations (see below).[67] Vector planning also proved advantageous in patients with keratoconus.[68]

No good data tin can be found that compare the percentage of LASIK procedures that employ wavefront guidance versus the pct that do not, nor the percent of refractive surgeons who accept a preference i mode or the other. Wavefront technology continues to be positioned as an "advance" in LASIK with putative advantages;[69] [70] [71] [72] still, information technology is clear that not all LASIK procedures are performed with wavefront guidance.[73]

Still, surgeons claim patients are generally more than satisfied with this technique than with previous methods, particularly regarding lowered incidence of "halos," the visual artifact acquired by spherical abnormality induced in the eye by earlier methods. A meta-assay of viii trials showed a lower incidence of these higher order aberrations in patients who had wavefront-guided LASIK compared to non-wavefront-guided LASIK.[74] Based on their experience, the Us Air Strength has described WFG-Lasik as giving "superior vision results".[75]

Topography-assisted [edit]

Topography-assisted LASIK is intended to be an advancement in precision and reduce night-vision side effects. The offset topography-assisted device received FDA approval September 13, 2013.[76] [77]

History [edit]

Barraquer'due south early piece of work [edit]

In the 1950s, the microkeratome and keratomileusis technique were developed in Bogotá, Colombia, by the Castilian ophthalmologist Jose Barraquer. In his clinic, he would cut thin (one hundredth of a mm thick) flaps in the cornea to alter its shape. Barraquer likewise investigated how much of the cornea had to be left unaltered in lodge to provide stable long-term results.[78] This work was followed past that of the Russian scientist, Svyatoslav Fyodorov, who adult radial keratotomy (RK) in the 1970s and designed the first posterior sleeping room implantable contact lenses (phakic intraocular lens) in the 1980s.[ citation needed ]

Laser refractive surgery [edit]

In 1980, Rangaswamy Srinivasan, Samuel Due east. Blum and James J. Wynne at the IBM Enquiry laboratory, discovered that an ultraviolet excimer laser could etch living tissue, with precision and with no thermal damage to the surrounding surface area. The miracle was termed "ablative photo-decomposition" (APD).[79] [80] Five years later, in 1985, Steven Trokel at the Edward S. Harkness Middle Institute, Columbia University in New York City, published his piece of work using the excimer laser in radial keratotomy. He wrote,

"The key corneal flattening obtained past radial diamond knife incisions has been duplicated by radial laser incisions in 18 enucleated human eyes. The incisions, made by 193 nm far-ultraviolet light radiation emitted by the excimer light amplification by stimulated emission of radiation, produced corneal flattening ranging from 0.12 to 5.35 diopters. Both the depth of the corneal incisions and the degree of central corneal flattening correlated with the laser free energy practical. Histopathology revealed the remarkably smooth edges of the laser incisions."[81]

Together with his colleagues, Charles Munnerlyn and Terry Clapham, Trokel founded VISX USA inc.[82] Marguerite B. MacDonald MD performed the first human VISX refractive laser eye surgery in 1989.[83]

Patent [edit]

A number of patents accept been issued for several techniques related to LASIK. Rangaswamy Srinivasan and James Wynne filed a patent application on the ultraviolet excimer light amplification by stimulated emission of radiation, in 1986, issued in 1988.[84] In 1989, Gholam A. Peyman was granted a US patent for using an excimer light amplification by stimulated emission of radiation to modify corneal curvature.[85] It was,

"A method and appliance for modifying the curvature of a live cornea via utilise of an excimer laser. The alive cornea has a thin layer removed therefrom, leaving an exposed internal surface thereon. So, either the surface or thin layer is exposed to the light amplification by stimulated emission of radiation beam forth a predetermined design to ablate desired portions. The thin layer is then replaced onto the surface. Ablating a cardinal expanse of the surface or sparse layer makes the cornea less curved, while ablating an annular area spaced from the center of the surface or layer makes the cornea more curved. The desired predetermined blueprint is formed past utilize of a variable diaphragm, a rotating orifice of variable size, a movable mirror or a movable cobweb optic cablevision through which the laser axle is directed towards the exposed internal surface or removed thin layer."[84]

The patents related to so-called wide-beam LASIK and PRK technologies were granted to U.s. companies including Visx and Summit during 1990–1995 based on the cardinal US patent issued to IBM (1988) which claimed the use of UV light amplification by stimulated emission of radiation for the ablation of organic tissues.[84]

Implementation in the U.Due south. [edit]

The LASIK technique was implemented in the U.Southward. after its successful application elsewhere. The Food and Drug Assistants (FDA) commenced a trial of the excimer laser in 1989. The first enterprise to receive FDA blessing to apply an excimer laser for photo-refractive keratectomy was Pinnacle Engineering (founder and CEO, Dr. David Muller).[86] In 1992, nether the direction of the FDA, Greek ophthalmologist Ioannis Pallikaris introduced LASIK to x VISX centers. In 1998, the "Kremer Excimer Light amplification by stimulated emission of radiation", series number KEA 940202, received FDA approval for its atypical use for performing LASIK.[87] Subsequently, Summit Technology was the start company to receive FDA approval to mass manufacture and distribute excimer lasers. VISX and other companies followed.[87]

The excimer laser that was used for the get-go LASIK surgeries by I. Pallikaris

Pallikaris suggested a flap of cornea could be raised by microkeratome prior to the performing of PRK with the excimer light amplification by stimulated emission of radiation. The add-on of a flap to PRK became known every bit LASIK.

Recent years [edit]

The process seems to be a declining option for many in the United States, dropping more than l percentage, from well-nigh ane.five meg surgeries in 2007 to 604,000 in 2015, according to the centre-intendance data source Market Scope.[88] A written report in the journal Cornea determined the frequency with which LASIK was searched on Google from 2007 to 2011.[89] Within this time frame, LASIK searches declined past 40% in the United States.[89] Countries such as the U.Yard. and Bharat also showed a decline, 22% and 24% respectively.[89] Canada, still, showed an increment in LASIK searches by 8%.[89] This subtract in interest can be attributed to several factors: the emergence of refractive cataract surgery, the economic recession in 2008, and unfavorable media coverage from the FDA'southward 2008 press release on LASIK.[9]

Further research [edit]

Since 1991, there have been farther developments such as faster lasers; larger spot areas; bladeless flap incisions; intraoperative corneal pachymetry; and "wavefront-optimized" and "wavefront-guided" techniques which were introduced by the Academy of Michigan'southward Center for Ultrafast Optical Science. The goal of replacing standard LASIK in refractive surgery is to avoid permanently weakening the cornea with incisions and to evangelize less energy to the surrounding tissues. More recently, techniques like Epi-Bowman Keratectomy have been developed that avoid touching the epithelial basement membrane or Bowman's layer.[90]

Experimental techniques [edit]

  • "evidently" LASIK: LASEK, Epi-LASIK,
  • Wavefront-guided PRK,
  • advanced intraocular lenses.
  • Femtosecond laser intrastromal vision correction: using all-femtosecond correction, for case, Femtosecond Lenticule EXtraction, FLIVC, or IntraCOR),
  • Keraflex: a thermobiochemical solution which has received the CE Mark for refractive correction.[91] and is in European clinical trials for the correction of myopia and keratoconus.[92]
  • Technolas FEMTEC laser: for incisionless IntraCOR ablation for presbyopia,[93] with trials ongoing for myopia and other conditions.[94]
  • LASIK with the IntraLase femtosecond laser: early on trials comparing to the «LASIK with microkeratomes for the correction of myopia suggest no meaning differences in safe or efficacy. However, the femtosecond laser has a potential advantage in predictability, although this finding was not significant».[95]

Comparing to photorefractive keratectomy [edit]

A systematic review that compared PRK and LASIK concluded that LASIK has shorter recovery time and less pain.[96] The two techniques later on a period of one year have similar results.[96]

A 2022 systematic review found dubiety in visual acuity, simply constitute that in one written report, those receiving PRK were less likely to achieve a refractive error, and were less likely to accept an over-correction than compared to LASIK.[97]

References [edit]

  1. ^ a b c d e f Rabin, Roni Caryn (June 11, 2018). "Lasik's Risks Are Coming Into Sharper Focus – Some patients who undergo the eye surgery report a variety of side furnishings. They may persist for years, studies prove". The New York Times . Retrieved June 11, 2018.
  2. ^ a b c Finn, Peter (20 December 2012). "Medical Mystery: Preparation for surgery revealed cause of deteriorating eyesight". The Washington Post.
  3. ^ Maguire, Stephen. "Laser Eye Surgery". The Irish gaelic Times.
  4. ^ Lovisolo CF, Reinstein DZ (November–Dec 2005). "Phakic intraocular lenses". Survey of Ophthalmology. 50 (6): 549–87. doi:ten.1016/j.survophthal.2005.08.011. PMID 16263370.
  5. ^ Sanders DR, Vukich JA (May 2003). "Comparing of implantable contact lens and laser assisted in situ keratomileusis for moderate to high myopia". Cornea. 22 (4): 324–31. doi:10.1097/00003226-200305000-00009. PMID 12792475. S2CID 21142105.
  6. ^ Lindfield D, Poole T. "Nd:YAG Treatment of Epithelial Ingrowth". Cataract and Refractive Surgery Today. Retrieved 12 September 2013.
  7. ^ Stodola, Ellen (April ane, 2016). "LASIK worldwide". EyeWorld.org. Archived from the original on June 12, 2018. Retrieved June 12, 2018.
  8. ^ "A Look at LASIK Past, Present and Futurity". EyeNet Magazine. Archived from the original on 31 July 2013. Retrieved 12 September 2013.
  9. ^ a b Corcoran KJ (July 2015). "Macroeconomic landscape of refractive surgery in the United States". Electric current Opinion in Ophthalmology. 26 (4): 249–54. doi:10.1097/ICU.0000000000000159. PMID 26058020. S2CID 11842503.
  10. ^ "Photorefractive (laser) surgery for the correction of refractive errors" (pdf). National Health Service. March 2006.
  11. ^ "LASIK – When is LASIK not for me?". FDA. 2018-11-03. Retrieved 20 December 2018.
  12. ^ Saragoussi D, Saragoussi JJ (September 2004). "[Lasik, PRK and quality of vision: a study of prognostic factors and a satisfaction survey]". Journal Français d'Ophtalmologie (in French). 27 (seven): 755–64. doi:10.1016/S0181-5512(04)96210-9. PMID 15499272.
  13. ^ Bailey Md, Mitchell GL, Dhaliwal DK, Boxer Wachler BS, Zadnik Thousand (July 2003). "Patient satisfaction and visual symptoms afterwards laser in situ keratomileusis". Ophthalmology. 110 (seven): 1371–8. doi:10.1016/S0161-6420(03)00455-X. PMID 12867394.
  14. ^ McGhee CN, Craig JP, Sachdev N, Weed KH, Brownish AD (April 2000). "Functional, psychological, and satisfaction outcomes of laser in situ keratomileusis for high myopia". Journal of Cataract and Refractive Surgery. 26 (iv): 497–509. doi:x.1016/S0886-3350(00)00312-six. PMID 10771222. S2CID 13304987.
  15. ^ Solomon KD, Fernández de Castro LE, Sandoval HP, Biber JM, Groat B, Neff KD, et al. (April 2009). "LASIK globe literature review: quality of life and patient satisfaction". Ophthalmology. 116 (4): 691–701. doi:10.1016/j.ophtha.2008.12.037. PMID 19344821.
  16. ^ Saccharide A, Hood CT, Mian SI (January 2017). "Patient-Reported Outcomes Following LASIK: Quality of Life in the Cruise Studies". JAMA. 317 (ii): 204–205. doi:ten.1001/jama.2016.19323. PMID 28097345.
  17. ^ a b "LASIK Middle Surgery". The New York Times . Retrieved 10 September 2013.
  18. ^ Shtein RM (October 2011). "Mail service-LASIK dry out eye". Skilful Review of Ophthalmology. 6 (5): 575–582. doi:ten.1586/eop.11.56. PMC3235707. PMID 22174730.
  19. ^ Levinson BA, Rapuano CJ, Cohen EJ, Hammersmith KM, Ayres BD, Laibson PR (January 2008). "Referrals to the Wills Heart Institute Cornea Service afterwards laser in situ keratomileusis: reasons for patient dissatisfaction". Journal of Cataract and Refractive Surgery. 34 (one): 32–9. doi:x.1016/j.jcrs.2007.08.028. PMID 18165078. S2CID 11133295.
  20. ^ Jabbur NS, Sakatani K, O'Brien TP (September 2004). "Survey of complications and recommendations for management in dissatisfied patients seeking a consultation later on refractive surgery". Journal of Cataract and Refractive Surgery. 30 (ix): 1867–74. doi:ten.1016/j.jcrs.2004.01.020. PMID 15342048. S2CID 25054973.
  21. ^ Rodemich, Karen (2010). "Onetime FDA official warns of LASIK risks: the man who OK'd LASIK now warns of an "epidemic" of eye bug". Review of Optometry. 147 (ten): four.
  22. ^ Cha, Ariana Eunjung (2016-xi-23). "Many LASIK patients may wind up with glare, halos or other visual symptoms, report suggests". Washington Postal service. ISSN 0190-8286. Retrieved 2018-04-04 .
  23. ^ Pallikaris IG, Panagopoulou SI (July 2015). "PresbyLASIK approach for the correction of presbyopia". Current Opinion in Ophthalmology. 26 (4): 265–72. doi:ten.1097/icu.0000000000000162. PMID 26058023. S2CID 35434343.
  24. ^ Pop 1000, Payette Y (January 2004). "Risk factors for night vision complaints afterwards LASIK for myopia". Ophthalmology. 111 (ane): 3–10. doi:10.1016/j.ophtha.2003.09.022. PMID 14711706.
  25. ^ Padmanabhan P, Basuthkar SS, Joseph R (Jul–Aug 2010). "Ocular aberrations later wavefront optimized LASIK for myopia". Indian Journal of Ophthalmology. 58 (4): 307–12. doi:10.4103/0301-4738.64139. PMC2907032. PMID 20534921.
  26. ^ "Private Gamble Factors of Halos, Loss of Contrast Sensitivity, Glare and Starbursts afterwards LASIK." operationauge.com
  27. ^ Yamane North, Miyata K, Samejima T, Hiraoka T, Kiuchi T, Okamoto F, et al. (November 2004). "Ocular higher-society aberrations and dissimilarity sensitivity after conventional laser in situ keratomileusis". Investigative Ophthalmology & Visual Science. 45 (11): 3986–ninety. doi:10.1167/iovs.04-0629. PMID 15505046.
  28. ^ Oshika T, Miyata K, Tokunaga T, Samejima T, Amano S, Tanaka Southward, et al. (June 2002). "Higher guild wavefront aberrations of cornea and magnitude of refractive correction in light amplification by stimulated emission of radiation in situ keratomileusis". Ophthalmology. 109 (6): 1154–viii. doi:10.1016/S0161-6420(02)01028-X. PMID 12045059.
  29. ^ a b "Light amplification by stimulated emission of radiation eye surgery". NHS Choices. 5 March 2012. Retrieved 26 Oct 2013.
  30. ^ "LASIK – What are the risks and how can I find the right md for me?". Food and Drug Administration. 12 September 2011. Retrieved 26 October 2013.
  31. ^ Simpson RG, Moshirfar G, Edmonds JN, Christiansen SM, Behunin North (2012). "Light amplification by stimulated emission of radiation in situ keratomileusis in patients with collagen vascular illness: a review of the literature". Clinical Ophthalmology. 6: 1827–37. doi:10.2147/OPTH.S36690. PMC3497460. PMID 23152662.
  32. ^ "LASIK". Fda.gov. 2008-eleven-11. Retrieved 2011-12-10 .
  33. ^ Majmudar, PA. "LASIK Complications." Focal Points: Clinical Modules for Ophthalmologists. American Academy of Ophthalmology. September, 2004. Archived March 11, 2006, at the Wayback Car
  34. ^ Carrillo C, Chayet AS, Dougherty PJ, Montes K, Magallanes R, Najman J, et al. (2005). "Incidence of complications during flap creation in LASIK using the NIDEK MK-2000 microkeratome in 26,600 cases". Journal of Refractive Surgery. 21 (5 Suppl): S655-vii. doi:10.3928/1081-597X-20050902-xx. PMID 16212299.
  35. ^ "Eye Surgery Educational activity Council". Lasikinstitute.org. Archived from the original on 2011-09-28. Retrieved 2011-12-10 .
  36. ^ Tham VM, Maloney RK (May 2000). "Microkeratome complications of laser in situ keratomileusis". Ophthalmology. 107 (5): 920–4. doi:10.1016/S0161-6420(00)00004-10. PMID 10811084.
  37. ^ a b Vesaluoma Thou, Pérez-Santonja J, Petroll WM, Linna T, Alió J, Tervo T (February 2000). "Corneal stromal changes induced by myopic LASIK". Investigative Ophthalmology & Visual Scientific discipline. 41 (2): 369–76. PMID 10670464.
  38. ^ a b c d Sun L, Liu G, Ren Y, Li J, Hao J, Liu Ten, Zhang Y (2005). "Efficacy and safety of LASIK in x,052 eyes of 5081 myopic Chinese patients". Periodical of Refractive Surgery. 21 (5 Suppl): S633-5. doi:10.3928/1081-597X-20050902-15. PMID 16212294.
  39. ^ "Ectasia Later on LASIK". American Academy of Ophthalmology.
  40. ^ Galvis V, Tello A, Ortiz AI, Quintero MP, Parra MM, Blanco NA (Apr–June 2019). "Traumatic corneal flap avulsion and loss 13 years subsequently LASIK". Saudi Periodical of Ophthalmology. 33 (two): 172–176. doi:10.1016/j.sjopt.2018.08.001. PMC6664271. PMID 31384163.
  41. ^ a b Ruiz-Moreno JM, Alió JL (2003). "Incidence of retinal disease following refractive surgery in 9,239 optics". Periodical of Refractive Surgery. 19 (5): 534–47. doi:10.3928/1081-597X-20030901-08. PMID 14518742.
  42. ^ Suarez E, Torres F, Vieira JC, Ramirez E, Arevalo JF (October 2002). "Anterior uveitis later on laser in situ keratomileusis". Journal of Cataract and Refractive Surgery. 28 (ten): 1793–eight. doi:x.1016/S0886-3350(02)01364-0. PMID 12388030. S2CID 11880947.
  43. ^ Boes DA, Omura AK, Hennessy MJ (December 2001). "Effect of loftier-altitude exposure on myopic laser in situ keratomileusis". Periodical of Cataract and Refractive Surgery. 27 (12): 1937–41. doi:10.1016/S0886-3350(01)01074-4. PMID 11738908. S2CID 45468164.
  44. ^ Dimmig JW, Tabin G (2003). "The ascent of Mount Everest post-obit light amplification by stimulated emission of radiation in situ keratomileusis". Periodical of Refractive Surgery. nineteen (1): 48–51. doi:ten.3928/1081-597X-20030101-10. PMID 12553606.
  45. ^ Hammer T, Heynemann M, Naumann I, Duncker GI (March 2006). "[Correction and induction of loftier-order aberrations after standard and wavefront-guided LASIK and their influence on the postoperative contrast sensitivity]". Klinische Monatsblätter für Augenheilkunde (in German). 223 (3): 217–24. doi:10.1055/southward-2005-858864. PMID 16552654.
  46. ^ Alió JL, Montés-Mico R (February 2006). "Wavefront-guided versus standard LASIK enhancement for balance refractive errors". Ophthalmology. 113 (2): 191–7. doi:10.1016/j.ophtha.2005.10.004. PMID 16378639.
  47. ^ Caster AI, Hoff JL, Ruiz R (2005). "Conventional vs wavefront-guided LASIK using the LADARVision4000 excimer laser". Journal of Refractive Surgery. 21 (half dozen): S786-91. doi:10.3928/1081-597X-20051101-28. PMID 16329381.
  48. ^ Health, Center for Devices and Radiological (2018-11-03). "LASIK – What are the risks and how can I find the right physician for me?". FDA . Retrieved 20 December 2018.
  49. ^ "LASIK laser eye surgery". Webmd.boots.com. Archived from the original on 2016-05-fifteen. Retrieved 2016-05-06 .
  50. ^ St. Philip, Elizabeth; Favaro, Avis (April vii, 2019). "Families bargain with repercussions after rare just severe complications from laser eye surgery". CTV . Retrieved 26 November 2019.
  51. ^ a b "LASIK Quality of Life Collaboration Project". U.S Food and Drug Assistants. Retrieved 28 November 2014.
  52. ^ "Latest on FDA'south LASIK Program". U.S Food and Drug Administration. 2019-04-26.
  53. ^ Eydelman MB, LASIK Quality of Life Collaboration Project (LQOLCP) (PDF), U.S. Food and Drug Administration
  54. ^ LASIK Quality of Life Collaboration Project: Written report Results Presented at the Refractive Surgery Subspecialty Day of the American University of Ophthalmology (AAO) on October 17, 2022 (PDF – 1.8MB)
  55. ^ "What are the risks and how tin I find the right dr. for me?". U.S. Nutrient and Drug Assistants. Retrieved 2015-12-03 .
  56. ^ "LASIK for Myopia and Astigmatism: Safety and Efficacy – EyeWiki". eyewiki.aao.org . Retrieved 2019-08-06 .
  57. ^ Wellness, Heart for Devices and Radiological (2018-xi-03). "When is LASIK not for me?". FDA.
  58. ^ "US FDA/CDRH: LASIK – What are the risks and how can I find the right doc for me?". Fda.gov. June 9, 2014. Retrieved Dec 23, 2016.
  59. ^ "Am I a Candidate For LASIK Surgery? TLC Laser Eye Centers". Tlcvision.com . Retrieved 20 Dec 2018.
  60. ^ Shortt AJ, Allan BD, Evans JR (Jan 2013). "Laser-assisted in-situ keratomileusis (LASIK) versus photorefractive keratectomy (PRK) for myopia". The Cochrane Database of Systematic Reviews. 1 (i): CD005135. doi:10.1002/14651858.CD005135.pub3. PMID 23440799. At that place was prove that LASIK gives a faster visual recovery than PRK and is a less painful technique. Results at ane year subsequently surgery were comparable: well-nigh analyses favoured LASIK only they were non statistically significant.
  61. ^ "Patent: ultraviolet solid country laser". Freepatentsonline.com . Retrieved 2011-12-10 .
  62. ^ Azar DT, Gatinel D (2007). Refractive surgery (2nd ed.). Philadelphia: Mosby Elsevier. ISBN978-0-323-03599-vi.
  63. ^ Walsh MJ. Is the future of refractive surgery based on corneal topography or wavefront? "Ocular Surgery News". August 1, 2000, folio 26.
  64. ^ Walsh MJ. Wavefront is showing signs of success, but tin it do it alone? Ocular Surgery News. September 1, 2000, page 41.
  65. ^ EW Dialogue: the future of wavefront refraction every bit a diagnostic tool. "EyeWorld". May 2000, pages 64 and 65.
  66. ^ a b c Alpins NA (2002). "Wavefront technology: a new advance that fails to answer old questions on corneal vs. refractive astigmatism correction". Periodical of Refractive Surgery. xviii (six): 737–9. doi:10.3928/1081-597X-20021101-12. PMID 12458868.
  67. ^ a b Alpins N, Stamatelatos G (August 2008). "Clinical outcomes of laser in situ keratomileusis using combined topography and refractive wavefront treatments for myopic astigmatism". Journal of Cataract and Refractive Surgery. 34 (8): 1250–9. doi:ten.1016/j.jcrs.2008.03.028. PMID 18655973. S2CID 29819060.
  68. ^ Alpins N, Stamatelatos G (April 2007). "Customized photoastigmatic refractive keratectomy using combined topographic and refractive data for myopia and astigmatism in eyes with forme fruste and mild keratoconus". Journal of Cataract and Refractive Surgery. 33 (4): 591–602. doi:x.1016/j.jcrs.2006.12.014. PMID 17397730. S2CID 14881153.
  69. ^ American University of Ophthalmology. "Refractive Light amplification by stimulated emission of radiation Surgery: An In-Depth Look at LASIK and Brief Overview of PRK, Epi-LASIK, and LASEK: A Science Writer'southward Guide" Archived 2012-06-16 at the Wayback Auto. Accessed Jan 29, 2012.
  70. ^ Abbott Medical Eyes website. "WaveScan WaveFront Arrangement". Accessed Baronial 15, 2012.
  71. ^ Emory Healthcare website. "Wavefront technology". Accessed August 15, 2012.
  72. ^ Croes K. AllAboutVision website. "Custom LASIK or wavefront LASIK: individualized vision correction". Accessed August 15, 2012.
  73. ^ Segre Fifty. "Toll of LASIK middle surgery and other cosmetic procedures". Allaboutvision.com . Retrieved 2012-08-15 .
  74. ^ Fares U, Suleman H, Al-Aqaba MA, Otri AM, Said DG, Dua HS (August 2011). "Efficacy, predictability, and safety of wavefront-guided refractive laser treatment: metaanalysis". Journal of Cataract and Refractive Surgery. 37 (8): 1465–75. doi:10.1016/j.jcrs.2011.02.029. PMID 21782089. S2CID 26968756.
  75. ^ Campbell S. "Air Force aims for 'weapons-class' vision". Af.mil. Archived from the original on 2012-07-28. Retrieved 2011-12-10 .
  76. ^ "Nidek EC-5000 Excimer Laser Arrangement – P970053/S011". Nutrient and Drug Administration. 2013-ten-13. Retrieved 2016-05-01 .
  77. ^ Stulting D (2014-04-28). "Topography-guided LASIK: A image shift in refractive light amplification by stimulated emission of radiation treatment" (PDF). EyeWorld Daily News. Retrieved 2016-05-01 .
  78. ^ Troutman RC, Swinger C (1978). "Refractive keratoplasty: keratophakia and keratomileusis". Transactions of the American Ophthalmological Guild. 76: 329–39. PMC1311630. PMID 382579.
  79. ^ "Prize for the Industrial Application of Physics Winner – American Constitute of Physics". Aip.org. Archived from the original on 2011-09-28. Retrieved 2011-12-x .
  80. ^ "James Wynne". laserfest.org . Retrieved xxx December 2021.
  81. ^ Cotliar AM, Schubert HD, Mandel ER, Trokel SL (February 1985). "Excimer laser radial keratotomy". Ophthalmology. 92 (2): 206–8. doi:x.1016/s0161-6420(85)34052-6. PMID 3982798.
  82. ^ "Archived copy". Archived from the original on 2015-ten-19. Retrieved 2019-01-25 . {{cite web}}: CS1 maint: archived copy as championship (link)
  83. ^ McDonald MB, Kaufman HE, Frantz JM, Shofner S, Salmeron B, Klyce SD (May 1989). "Excimer laser ablation in a human center. Case report". Archives of Ophthalmology. 107 (five): 641–ii. doi:10.1001/archopht.1989.01070010659013. PMID 2719572.
  84. ^ a b c US4784135, Samuel E. Blum, Rangaswamy Srinivasan, James J. Wynne, "Far ultraviolet surgical and dental procedures", issued 1988-11-xv
  85. ^ US4840175, Gholam A. Peyman, "Method for modifying corneal curvature", issued 1988-6-20
  86. ^ "FDA-Approved Lasers for PRK and Other Refractive Surgeries". Fda.gov . Retrieved 2011-12-10 .
  87. ^ a b "Listing of FDA-Approved Lasers for LASIK". Fda.gov . Retrieved 2011-12-ten .
  88. ^ Schoenberg, Nara (May 23, 2016). "Lasik surgery falling out of favor with patients". Chicago Tribune.
  89. ^ a b c d Stein JD, Childers DM, Nan B, Mian SI (July 2013). "Gauging interest of the full general public in laser-assisted in situ keratomileusis heart surgery". Cornea. 32 (7): 1015–eight. doi:ten.1097/ICO.0b013e318283c85a. PMC3679260. PMID 23538615.
  90. ^ Editor, Sean McKinney, Senior. "Time to Revisit Surface Ablation?". www.reviewofophthalmology.com.
  91. ^ "You are being redirected..." (PDF). Avedro.com . Retrieved twenty December 2018.
  92. ^ "CRSTodayEurope.com > May 2010 > Manufacture interview: Aiming to alter the face of refractive surgery—again". Bmctoday.net. 2010-04-sixteen. Retrieved 2011-12-ten .
  93. ^ "IntraCOR for presbyopia" (PDF). 2010pv.com. Archived from the original (PDF) on 2011-09-02. Retrieved 20 Dec 2018.
  94. ^ "IntraCOR for myopia" (PDF). 2010pv.com. Archived from the original (PDF) on 2011-09-02. Retrieved 20 December 2018.
  95. ^ Chen Due south, Feng Y, Stojanovic A, Jankov MR, Wang Q (January 2012). "IntraLase femtosecond laser vs mechanical microkeratomes in LASIK for myopia: a systematic review and meta-analysis" (PDF). Journal of Refractive Surgery. 28 (one): 15–24. doi:ten.3928/1081597x-20111228-02. PMID 22233436.
  96. ^ a b Shortt AJ, Allan BD, Evans JR (January 2013). "Laser-assisted in-situ keratomileusis (LASIK) versus photorefractive keratectomy (PRK) for myopia". The Cochrane Database of Systematic Reviews. ane (one): CD005135. doi:ten.1002/14651858.CD005135.pub3. PMID 23440799.
  97. ^ Kuryan J, Cheema A, Chuck RS (February 2017). "Light amplification by stimulated emission of radiation-assisted subepithelial keratectomy (LASEK) versus laser-assisted in-situ keratomileusis (LASIK) for correcting myopia". The Cochrane Database of Systematic Reviews. 2017 (two): CD011080. doi:ten.1002/14651858.CD011080.pub2. PMC5408355. PMID 28197998.

External links [edit]

  • What is LASIK? – Food and Drug Administration
  • Light amplification by stimulated emission of radiation Heart Surgery – United States National Library of Medicine

brewershoothe.blogspot.com

Source: https://en.wikipedia.org/wiki/LASIK

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