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Photorefractive keratectomy after radial keratotomy
J Meza1, J J Perez-Santonja, E Moreno
1Department of Ophthalmology, Jiménez-Díaz Foundation, Autonomous University of Madrid School of Medicine, Spain.
Journal of Cataract and Refractive Surgery
|September 1, 1994
Summary
Excimer laser photorefractive keratectomy (PRK) effectively corrects residual myopia after radial keratotomy (RK). This safe and predictable procedure offers stable visual acuity improvements for patients with prior RK surgery.
Area of Science:
- Ophthalmology
- Refractive Surgery
- Corneal Surgery
Background:
- Radial keratotomy (RK) can result in residual myopia.
- Undercorrected myopia after RK requires effective retreatment options.
Purpose of the Study:
- To evaluate the efficacy, predictability, and safety of excimer laser photorefractive keratectomy (PRK) for correcting residual myopia in eyes previously treated with RK.
Main Methods:
- A prospective study involving ten eyes with residual myopia after RK underwent PRK using a 193 nm excimer laser.
- Mean follow-up was seven months, with refractive and visual acuity measurements taken at multiple intervals.
Main Results:
- PRK resulted in a mean refractive shift towards hyperopia, with improvements in visual acuity.
- Eight eyes achieved 20/40 or better uncorrected visual acuity by three months post-PRK.
- One eye experienced transient visual acuity loss due to haze; no other significant complications were reported.
Conclusions:
- PRK is a predictable, effective, stable, and safe treatment for residual myopia following RK.
- Results are comparable to PRK in virgin eyes, with a slight tendency towards hyperopic shift.
- Subsequent PRK may benefit patients with undercorrected myopia after RK.