<prompt> The wavelength of laser in nanometers for shaping cornea in refractive surgery is-193 nm451 nm532 nm1064nm  <response>: Corneal Reshaping procedures such as photorefractive keratectomy PRK and Laser Assisted is Situ Keratomileusis LASIK are performed by lasers in the ultraviolet wavelength of 193nm to 213 nm. The most commonly used laser for such procedures is the Argon Fluride Excimer Laser ARF with a length of 193nm. Ref: Yanoff 3rde p.43 