Ten years outcomes after laser in situ keratomileusis for myopia

Objective: To evaluate the long-term outcomes and safety of laser in situ keratomilesis(LASIK) for myopia.Methods: 39 cases(77 eyes),who underwent LASIK,were divided into two groups: myopia ≤-6.0 D and -6.0 D.All patients were followed-up for 10 years after surgery.The main parameters for evaulation were predictability,stability,safety and efficacy.Uncorrected visual acuity(UCVA),best-corrected visual acuity(BCVA),refractions,topography,corneal thickness and postoperative complications were recorded at 10 years.Results: At the 10th year,63% of eyes with myopia ≤-6.0 D and 42% of eyes with myopia-6.0 D had 1.0 or better UCVA,27% of eyes with myopia ≤-6.0 D and 58% of eyes with myopia-6.0 D had less than 1.0 UCVA.98% of eyes with myopia ≤-6.0 D and 72% of eyes with myopia-6.0 D had 1.0 or better BCVA(P 0.05).There were significant differences at values of Diff value on anterior and posterior surface,Irreg at 3 mm and 5 mm zone obtained from Orbscan Ⅱand corneal thickness between pre-and post-operation(P 0.01).Mean corneal thickness at the 10th year postoperatively was higher than attempted residual corneal thickness after ablation,it suggested that the stroma of cornea proliferated.Conclusion:LASIK surgery is safe and has predictable and stable results in refractive and visual outcomes in correcting myopia on long-term follow-up.