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Laser in situ keratomileusis to correct high myopia
J J Pérez-Santonja1, J Bellot, P Claramonte
1Refractive Surgery Section, Alicante Institute of Ophthalmology, University of Alicante, School of Medicine, Spain.
Journal of Cataract and Refractive Surgery
|April 1, 1997
Summary
Laser in situ keratomileusis (LASIK) effectively corrects high myopia, but accuracy decreases with higher diopter corrections. Surgical algorithms need refinement for better predictability in severe myopia cases.
Area of Science:
- Ophthalmology
- Refractive Surgery
Background:
- High myopia presents significant challenges for vision correction.
- Laser in situ keratomileusis (LASIK) is a common refractive surgical procedure.
Purpose of the Study:
- To assess the efficacy, predictability, and safety of LASIK for high myopia (8.00 to 20.00 diopters).
Main Methods:
- Prospective study involving 143 eyes undergoing LASIK with automated corneal shaping and excimer laser.
- Utilized a multizone ablation profile and sutureless hinged corneal flap technique.
Main Results:
- 45-46% achieved 20/40 uncorrected vision; best corrected visual acuity (BCVA) improved and stabilized by 3 months.
- Predictability was higher for myopia up to 12.00 D, with 57.5%-60% within 1.00 D of emmetropia.
- Corneal steepening and increased thickness observed; flap thickness and ablation depth deviated from predictions. Minor complications occurred, none vision-threatening.
Conclusions:
- LASIK is effective for high myopia but less accurate beyond -12.00 D.
- Surgical algorithms require modification to enhance predictability for higher refractive errors.
- Long-term follow-up is essential to determine the incidence of vision-threatening complications.