<unk>  <unk>  is a refractive surgical procedure to correct myopia (nearsightedness). It was developed in 1974 by Svyatoslav Fyodorov, a Russian ophthalmologist. It has been largely supplanted by newer operations, such as photorefractive keratectomy, LASIK, Epi-LASIK and the phakic intraocular lens. Approximately 10% of all practicing ophthalmologists in the United States have performed several hundred thousand<unk>  procedures.
Radial keratotomy
Phototherapeutic keratectomy
Boston keratoprosthesis
Corneal transplantation
Photorefractive keratectomy
Conductive keratoplasty
Laser thermal keratoplasty
Excimer laser trabeculostomy