Technology with an Excimer Laser, eye doctors perform: PRK = PhotoRefractive Keratectomy LASIK = Laser Assisted in situ Keratomileusis in focus vision PRK Began in Europe in the late '80s painless, your eye is numbed with anesthetic drops performed with the Excimer laser alone directly on the cornea removes a layer as thin as a human hair from the cornea is suitable for: neasightedness below -10 diopters farsightedness below +6 diopters astigmatism positive and negative. Quick and simple procedure. Temporary removal of the outer layer of the cornea may cause discomfort LASIK The concept goes back to 1990. It became automated around 1995. painless, your eye is numbed with anesthetic drops a two-step procedure involving the Excimer Laser and the automated microkeratome The aim is to create a flap so the Excimer laser acts on the corneal bed. Suitable for: nearsightedness ranging between -4 and -15 diopters pour agir en profondeur et ne pas cicatriser en surface farsightedness up to +6 diopters A longer and more complex procedure for the ophthalmologist but more comfortable for the patient.