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Long-term refractive outcomes and stability after excimer laser surgery for myopia
Mohamed Dirani1, Terry Couper, Joanne Yau
1Centre for Eye Research Australia, University of Melbourne, Melbourne, Victoria, Australia. dirani@unimelb.edu.au
Journal of Cataract and Refractive Surgery
|September 28, 2010
Summary
Photorefractive keratectomy (PRK) and laser in situ keratomileusis (LASIK) effectively treat myopia long-term. LASIK demonstrated superior refractive stability compared to PRK up to 9 years post-surgery.
Area of Science:
- Ophthalmology
- Refractive Surgery
- Corneal Surgery
Background:
- Myopia, a common refractive error, affects distance vision.
- Photorefractive keratectomy (PRK) and laser in situ keratomileusis (LASIK) are surgical options for myopia correction.
- Long-term outcomes of these procedures require continued evaluation.
Purpose of the Study:
- To compare the long-term refractive results of PRK and LASIK for myopia correction.
- To assess refractive stability following these laser vision correction procedures.
Main Methods:
- A comparative case series analyzed data from 389 eyes (229 patients) undergoing PRK and/or LASIK.
- Preoperative refractions and visual outcomes up to 13 years post-surgery were evaluated.
- Data were compared between PRK and LASIK groups across different myopia severities.
Main Results:
- Both PRK and LASIK effectively corrected low-to-moderate and high myopia.
- At final follow-up, a significant percentage of eyes achieved correction within ±0.50 D.
- LASIK group showed a higher percentage of eyes within ±0.50 D correction compared to PRK.
Conclusions:
- Laser refractive surgery provides effective, long-term correction for all myopia levels.
- Refractive stability is generally achieved within one year post-operation.
- LASIK offers better refractive stability than PRK over a 6-9 year period.
