Related Experiment Videos
Photorefractive keratectomy for hyperopic and mixed astigmatism
D G Dausch1, R J Klein, E Schröder
1Department of Ophthalmology, Klinikum St. Marien, Amberg, Germany.
Journal of Refractive Surgery (Thorofare, N.J. : 1995)
|September 1, 1996
Summary
Photorefractive keratectomy effectively corrects compound hyperopic and mixed astigmatism. This excimer laser procedure offers significant visual acuity improvements and is safe for astigmatism up to 6.00 D.
Area of Science:
- Ophthalmology
- Refractive Surgery
- Corneal Surgery
Background:
- Photorefractive keratectomy (PRK) is established for simple and myopic astigmatism.
- This study investigates PRK for compound hyperopic and mixed astigmatism.
Purpose of the Study:
- To evaluate the efficacy and safety of excimer laser photorefractive keratectomy for correcting compound hyperopic and mixed astigmatism.
- To assess visual acuity outcomes and refractive stability after PRK.
Main Methods:
- Prospective clinical study involving 30 eyes with compound hyperopic astigmatism (Group I) and 17 eyes with mixed astigmatism (Group II).
- Treatment utilized an MEL 60 excimer laser (Aesculap-Meditec).
- An 18-month follow-up period was conducted for all participants.
Main Results:
- Compound hyperopic astigmatism group: 82.3% within +/-1.00 D, 64.7% within +/-0.50 D correction at 18 months.
- Mixed astigmatism group: 90.9% within +/-1.00 D, 72.7% within +/-0.50 D correction at 18 months.
- Significant improvements in uncorrected visual acuity were observed in both groups, with many achieving 20/40 or better.
Conclusions:
- Photorefractive keratectomy is an efficient and safe procedure for correcting compound hyperopic and mixed astigmatism.
- The treatment is effective for refractive errors up to 6.00 D.
- PRK demonstrates good refractive stability and visual outcomes over 18 months.