Aims To evaluate long-term refractive outcomes of laser in situ keratomileusis (LASIK).
Methods Along-term (7 years) prospective follow-up study of visual and refractive outcomes of patients who had LASIK surgery performed in 1998 and 1999. Fifty-nine patients (104 eyes) of the original cohort of 75 patients underwent detailed clinical assessment at 1 year and 7 years postoperatively. The main outcome measures were predictability, stability, efficacy and safety. Topography, pachymetry and postoperative complications were also recorded at 7 years. Furthermore, all patients received a questionnaire including 11 items to report individual satisfaction.
Results At 7 years postoperatively, 89.4% of eyes were within ± 0.5D of attempted correction with 90.4% within ± 1.0D. One hundred percent had a vision of 6/12 or better and 94.2% of 6/6 or better. Best spectacle corrected visual acuity (BSCVA) was unchanged or improved in 80.8%. There was no significant regression (P<0.05) between 1 year and 7 years postoperatively. Complications were rare and patient satisfaction with the surgery was high.
Conclusion LASIK surgery shows predictable and stable results in terms of refractive and visual outcomes. Refractive stability was maintained over 7 years. There was no evidence of progressive late-onset complications after LASIK. | 
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