photorefractive keratectomy
Pronunciation: /ˌfoʊtoʊrɪˈfræktɪv kɛrəˈtɛktəmi/
Also written as: PRK — Photorefractive keratectomy
Surface ablation laser eye surgery that removes corneal epithelium before reshaping the underlying stroma.
Full Definition
Photorefractive keratectomy (PRK) is a surface ablation refractive surgery technique that corrects myopia, hyperopia, and astigmatism by using an excimer laser to reshape the corneal surface. Unlike LASIK, PRK removes the corneal epithelium entirely before laser ablation, eliminating flap-related complications but requiring longer healing time as the epithelium regenerates. The procedure is particularly suitable for patients with thin corneas, irregular corneal surfaces, or occupations with high trauma risk. Recovery involves several days of discomfort and gradual visual improvement over weeks to months.
Usage
Usage note: PRK is the standard abbreviation; emphasize longer recovery compared to LASIK in patient counseling.
In Context
- "Photorefractive keratectomy was chosen over LASIK due to the patient's thin cornea." — Surgical plan
- "The patient experienced typical post-PRK discomfort managed with topical analgesics." — Post-operative follow-up