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Photorefractive keratectomy for myopia from 6.00 D to 10.00 D
Refractive & Corneal Surgery
|March 1, 1993
Summary
Photorefractive keratectomy (PRK) for high myopia is safe but shows poor predictability. Many patients experienced refractive regression and persistent corneal haze after the procedure.
Area of Science:
- Ophthalmology
- Refractive Surgery
Background:
- Excimer laser photorefractive keratectomy (PRK) is used for myopia correction.
- Its efficacy for high myopia remains debated.
Purpose of the Study:
- To evaluate the outcomes of PRK for high myopia.
- To assess predictability and long-term refractive stability.
Main Methods:
- Retrospective study of 40 PRK procedures for myopia (-6.00 D to -10.00 D).
- 24-month postoperative follow-up.
Main Results:
- Mean preoperative refraction: -8.12 D; Mean postoperative refraction: -2.31 D.
- 65% of eyes showed refractive regression after 6 months.
- 85% of eyes had persistent corneal haze (+1 grading) at 24 months.
Conclusions:
- PRK for high myopia is technically simple and safe.
- However, it demonstrates poor predictability and significant refractive regression.
- Corneal haze is a common complication.