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Radial keratotomy (RK) 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, more accurate operations, such as photorefractive keratectomy , LASIK , Epi-LASIK and the phakic intraocular lens .
Radial keratotomy (RK), developed by Russian ophthalmologist Svyatoslav Fyodorov in 1974, uses spoke-shaped incisions, always [clarification needed] made with a diamond knife, to alter the shape of the cornea and reduce myopia or astigmatism; this technique is, in medium to high diopters, usually replaced by other refractive methods.
[29] [30] Five years later, in 1985, Steven Trokel at the Edward S. Harkness Eye Institute, Columbia University in New York City, published his work using the excimer laser in radial keratotomy. He wrote, "The central corneal flattening obtained by radial diamond knife incisions has been duplicated by radial laser incisions in 18 enucleated ...
In 2016, however, the FDA approved cross-linking surgery as a treatment for keratoconus and recommended that a registry system should be set-up to evaluate the long-term treatment effect. [ 10 ] [ 71 ] The Save Sight Keratoconus Registry is an international database of keratoconus patients that is tracking outcomes of cross-linking in patients ...
There are also some pre-existing conditions that may complicate or preclude the treatment. [8] Collagen vascular disease (e.g., corneal ulceration or melting) Ocular disease (e.g., dry eye, keratoconus, glaucoma) Systemic disorders (e.g., diabetes, rheumatoid arthritis) History of side effects from steroids; Granular corneal dystrophy type II
Astigmatic keratotomy, arcuate keratotomy, or transverse keratotomy [clarification needed] Radial keratotomy; Hexagonal keratotomy [clarification needed] Epikeratophakia is the removal of the corneal epithelium and replacement with a lathe-cut corneal button. [15] Intracorneal rings or corneal ring segments [clarification needed] Implantable ...
Conductive keratoplasty (CK) is a type of refractive surgery that uses radio waves to adjust the contour of the cornea by shrinking the corneal collagen around it. [1] It is used to treat mild to moderate hyperopia.
Epikeratophakia [1] (also known as epikeratoplasty and onlay lamellar keratoplasty [2]) is a refractive surgical procedure in which a lamella of a donor cornea is transplanted onto the anterior surface of the patient's cornea.