摘要
Objective To evaluate the relevant factors of regression phenomenon of laser in situ kerato-mileusis (LASIK) for treatment of myopia. Methods We studied 408 eyes of 250 myopic patients who received LASIK. Patients were divided into 2 groups according to preoperative diopters (- 6 .00D- -10 .00D, 194 eyes;-10.10D- -15 .00D, 214 eyes). Mean period of follow-up were 12 months and the results were statistically analyzed. Results 12 months after surgery, in the first group (- 6.00--10.00D) the regressionequal to or beyond -1 .0D were 21 eyes (10.8%), range from -1 .0D to - 3 .0D. The average regression was -1.33D. In the second group (- 10 .10D - - 15 .00D) regression equal to or beyond -1.0D were 78 eyes (36.5%), range from -1 .0D to -5.50D. The average regression was -1 .99D. Conclusion The results indicate that excimer LASIK can be used to treat myopia between -6 .00D-- 15 .00D effectively with minimal regression within 12 months. Preoperative thin corneas with intraoperative small ablation zone could induce regression . Some modification of the surgical algorithms and laser nomogram will help to improve predictability and reduce regression.
Objective:To evaluate the relevant factors of regression phenomenon of laser in situ kerato-mileusis(LASIK)for treatment of myopia.Methods:We studied 408 eyes of 250 myopic patients who re-ceived LASIK.Patients were divided into 2 groups according to preoperative diopters(-6.00D--10.00D,194eyes;-10.10D--15.00D,214eyes).Mean period of follow-up were 12 months and the results were statisti-cally analyzed.Results:12 months after surgery,in the first group(-6.00D--10.00D)the regression equal to or beyond-1.0Dwere 21 eyes(10.8%),range from -1.0Dto -3.0D.The average regression was -1.33D.In the second group(-10.10D--15.00D) regression equal to or beyond-1.0Dwere 78 eyes (36.5%),range from -1.0D to -5.50D.The average regression was -1.99D--15.00D effectively with minimal re-gression within 12 months.Preoperative thin corneas with intraoperative small ablation zone could induce re-gression.Some modification of the surgical algorithms and laser nomogram will help to improve predictability and reduce regression.
