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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 .
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.
In 1980, Swinger performed first keratomileusis surgery in US. [2] In 1985, Krumeich and Swinger introduced non-freeze keratomileusis technique, [2] it remained a relatively imprecise technique. In 1974 a refractive procedure called Radial Keratotomy (RK) was developed in the USSR by Svyatoslav Fyodorov and later introduced to the United States ...
Most small, low-risk and superficial skin cancers, such as basal cell carcinoma and squamous cell carcinoma, could be treated by curettage and electrosurgery. [6] A clinical margin which includes areas around the lesion site is marked out, and local anesthesia or numbing medicine is applied.
[7] [8] [9] The risk is estimated to be between 0.25% [6] and 0.7% [10] Healing of the RK incisions is very slow and unpredictable, often incomplete even years after surgery. [11] Similarly, infection of these chronic wounds can also occur years after surgery, [ 12 ] [ 13 ] [ 14 ] with 53% of ocular infections being late in onset.
In severe cases, surgery may be required due to excessive corneal scarring such as superficial keratectomy (SK), phototherapeutic keratectomy (PTK), lamellar keratoplasty, or penetrating keratoplasty. [1] Patients may relapse in symptoms but surgery prolongs the reoccurrence and may also lessen severity. [1]
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]