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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. [1]
LASIK or Lasik (/ ˈ l eɪ s ɪ k /; "laser-assisted in situ keratomileusis"), commonly referred to as laser eye surgery or laser vision correction, is a type of refractive surgery for the correction of myopia, hyperopia, and astigmatism. [1]
The procedure can be used to treat astigmatism, nearsightedness, and farsightedness. [3] During the procedure, the epithelium is displaced using a diluted alcohol solution. [4] PRK has advantages over LASIK in that it avoids added complications associated with the flap created during surgery.
The ICL is used to correct myopia ranging from −0.5 to −18 diopters, and +0.5 cylinder power to +6.0 for the Toric ICL models. Generally refractive surgery can be broadly divided into: corneal surgery, scleral surgery, lens related surgery (including phakic IOL implantation, clear lens extraction, photophacoreduction and ...
Laser Blended Vision can be achieved through laser eye surgery, usually performed as LASIK, although surface laser eye surgery PRK or LASEK can be used to produce the effect. Laser Blended Vision works by increasing the depth of field of each eye through subtle changes in the optics of the corneal spherical aberration . [ 2 ]
Myopia can be corrected with eyeglasses, contact lenses, or by refractive surgery. [1] [16] Eyeglasses are the simplest and safest method of correction. [1] Contact lenses can provide a relatively wider corrected field of vision, but are associated with an increased risk of infection.