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Repeated photorefractive keratectomy for undercorrection and regression.
Juhani Pietilä1, Petri Mäkinen, Hannu Uusitalo
1Department of Ophthalmology, University of Tampere, Medical School, Finland.
Journal of Refractive Surgery (Thorofare, N.J. : 1995)
|April 6, 2002
Summary
Repeated photorefractive keratectomy (PRK) is safe and effective for treating myopia regression and undercorrection. However, significant haze or regression after the first PRK may reappear after retreatment.
Area of Science:
- Ophthalmology
- Refractive Surgery
Background:
- Photorefractive keratectomy (PRK) for myopia can lead to regression and undercorrection.
- Retreatment with PRK is a common approach to address these complications.
Purpose of the Study:
- To evaluate the safety and efficacy of PRK retreatment for myopia.
- To assess outcomes in eyes with regression or undercorrection after initial PRK.
Main Methods:
- Sixty-three eyes underwent PRK retreatment for initial regression or undercorrection.
- The same PRK technique was used for both initial surgery and retreatment.
- Residual myopia was less than -5.00 D in most eyes.
Main Results:
- 86% of eyes with low residual myopia achieved emmetropia within +/-1.00 D one year after retreatment.
- 86% achieved uncorrected visual acuity of 20/40 or better.
- Haze levels remained similar before and after retreatment, but significant haze reappeared in one eye with high myopia.
Conclusions:
- Repeated PRK is safe and effective for treating regression and undercorrection in eyes with low residual myopia.
- Eyes with significant prior haze or regression may experience recurrence after retreatment.