phototherapeutic keratectomy


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phototherapeutic keratectomy (PTK),

ablation of diseased corneal tissue using an excimer laser.

pho·to·ther·a·peu·tic ker·a·tec·to·my

(PTK) (fō'tō-thār'ă-pyū'tik ker'ă-tek'tŏ-mē)
Ablation of diseased corneal tissue using an excimer laser
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1) It has since been used in corneal refractive surgery to correct refractive errors using the technique photorefractive keratectomy (PRK) and successfully treat a variety of superficial corneal pathologies through phototherapeutic keratectomy (PTK) procedures.
6) Theo Seiler of Germany first performed excimer laser phototherapeutic keratectomy in a sighted eye in 1985, whereas Francis L'Esperance performed the first PRK in the US on a blind eye in 1987.
For example, one patient with Reis Buckler Dystrophy had had a penetrating graft in their right eye over 20 years ago and deep anterior lamellar keratoplasty in the left eye five years ago, with further phototherapeutic keratectomy for recurrence of corneal erosions, as well as LASIK to reduce astigmatism.
Phototherapeutic keratectomy (PTK) using excimer laser technology involves treating Bowman's layer, resulting in a modified, roughened surface to anchor the corneal epithelium.
Given his subjective complaints and evidence of progressive haze that was refractory to topical corticosteroid therapy, he was referred for transepithelial phototherapeutic keratectomy (PTK); all laboratory tests for systemic autoimmune disease were negative.
Surgical intervention, such as anterior stromal puncture (outside the visual axis), YAG laser micropuncture, cautery, alcohol-assisted epithelial debridement, and excimer laser phototherapeutic keratectomy (PTK) can be of benefit in reducing the rate of recurrent erosions.
Treat with corticosteroid eye drops or phototherapeutic keratectomy