<prompt> Laser used in LASIK?ExcimerArgonHolmiumNd-Yag  <response>: Ans. A. Excimer. Ref. Parsons diseases of Eye 21st pg. 76In LASIK, the Excimer laser beam LASIK with the excimer laser is the most popular and widely accepted Rx modality for myopia among all the choice available today. Surgical correction is only undertaken in individuals 21 years of age and above who have a stable refractive error, who have had unsatisfactory results with non- surgical Rx, and in whom corneal thinning disorders that lead to curvature myopia such as keratoconus have ruled out.Laser-assisted in situ keratomileusis LASIK SurgeryRange of myopia possible complicationsAMethods to induce flattening of the central cornea1Radial keratotomy1 to 6 DPerforation, infection, surgically induced astigmatism, corneal scarring, late rupture with trivial trauma2Intracorneal rings or segmentsICR or INTACS1 to 6 DUnpredictable results3Excimer laser photorefractive keratotomy PRK1 to 4 DDelayed visual recovery, faint corneal haze, glare and loss of contrast sensitivity4Excimer laser-assisted in situ keratomileusis LASIK2 to 12 DDry eye, infection, diffuse lamellar keratitis, interface debris and epithelial ingrowth, flap displacement, surgically induced astigmatism or aberrations, regression, iatrogenic thinning and ectasia, glare, difficulty with night driving and retinal detachment.5Excimer laser-assisted epithelial keratomileusis LASEK1 to 6 DSame as LASIK except there are no microtome-related complications6Femosecond laser-assisted LASIK2 to 12 DDiffuse lamellar keratitis, incomplete flap and interstitial corneal stromal haze are still potential problemsBMethods to reduce the overall refractory power of the eye1Clear lens extraction 15 DRetinal detachment, endophthalmitis2Phakic intraocular lens5-22 DEndophthalmitis, cataract 