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Phototherapeutic keratectomy (PTK) is a type of eye surgery that uses a laser to treat various ocular disorders by removing tissue from the cornea. PTK allows the removal of superficial corneal opacities and surface irregularities. It is similar to photorefractive keratectomy, which is used for the treatment of refractive conditions.
Mast cell stabilizers such as sodium cromoglycate (2%) drops 4–5 times a day are quite effective in controlling VKC, especially atopic ones. Azelastine eyedrops are also effective. Topical antihistamines can be used. Acetyl cysteine (0.5%) used topically has mucolytic properties and is useful in the treatment of early plaque formation.
Photorefractive keratectomy at U.S. Naval Medical Center San Diego. [ edit on Wikidata ] Photorefractive keratectomy ( PRK ) and laser-assisted sub-epithelial keratectomy (or laser epithelial keratomileusis [ 1 ] ) ( LASEK ) are laser eye surgery procedures intended to correct a person's vision, reducing dependency on glasses or contact lenses .
Peyman, MD on June 20, 1989. [4] It involves cutting a flap in the cornea and pulling it back to expose the corneal bed, then using an excimer laser to ablate the exposed surface to the desired shape, and then replacing the flap. The name LASIK was coined in 1991 by University of Crete and the Vardinoyannion Eye. [5]
Automated lamellar keratoplasty (ALK), also known as keratomileusis in situ, is a non-laser lamellar refractive procedure used to correct high degree refractive errors. [1]
Maximilian Salzmann (9 December 1862, in Vienna – 17 April 1954, in Graz) was an Austrian ophthalmologist. In 1887 he received his medical doctorate from the University of Vienna , where he later worked as an assistant to Ernst Fuchs at the eye hospital.
Its 10-year data was published as the PERK (Prospective Evaluation of Radial Keratotomy) study, which proved the onset of progressive hyperopia – often found a decade after the original surgery – is due to continued flattening of the central cornea. [6] Infectious keratitis: There is a risk of corneal infection after RK.
Superficial lamellar keratoplasty: Superficial lamellar keratoplasty is used to treat superficial corneal opacities, which occupies superficial one third part of stroma. In this technique, the opaque part of the cornea is removed and replaced with donor tissue, leaving healthy part of the cornea including deeper parts of stroma and endothelium.