Related Experiment Videos
Photorefractive keratectomy after radial keratotomy
A A al-Rajhi1, J M Risco, I A Badr
1King Khaled Eye Specialist Hospital, Riyadh, Saudi Arabia.
Journal of Refractive Surgery (Thorofare, N.J. : 1995)
|November 1, 1996
Summary
Photorefractive keratectomy (PRK) can correct residual myopia after radial keratotomy (RK). PRK is less effective and predictable for higher myopia (≥ -3.00 D) compared to lower myopia (< -3.00 D).
Area of Science:
- Ophthalmology
- Refractive Surgery
- Corneal Surgery
Background:
- Radial keratotomy (RK) can result in undercorrected residual myopia.
- Twenty-three eyes from 22 patients with residual myopia after RK were analyzed.
Purpose of the Study:
- To evaluate the safety and efficacy of photorefractive keratectomy (PRK) for correcting residual myopia post-RK.
- To compare outcomes in patients with lower vs. higher degrees of myopia.
Main Methods:
- Photorefractive keratectomy (PRK) was performed on eyes with residual myopia ranging from -1.25 to -5.75 diopters.
- Patient ages ranged from 22 to 40 years, with follow-up periods of 6 to 17 months post-PRK.
Main Results:
- 39% of eyes achieved uncorrected visual acuity of 20/20 or better.
- Refractive error was within +/- 0.50 D in 48% of eyes and within +/- 1.00 D in 65%.
- Eyes with less than -3.00 D myopia showed significantly better visual acuity and less haze post-PRK.
Conclusions:
- Photorefractive keratectomy (PRK) is a safe retreatment option for myopia after radial keratotomy (RK).
- PRK outcomes are less predictable and effective for higher degrees of myopia (≥ -3.00 D).