国人和白种人近视患者LASIK手术前后正负相对调节的比较

Differences in positive and negative relative accommodation between LASIK eyes of Chinese and Caucasian

目的:比较国人和白种人近视LASIK手术前后相对性调节、正相对调节(positive relative accommodation,PRA)、负相对调节(negative relative accommodation,NRA)的特点,探讨其对手术预矫度设计的参考意义。方法:选取22例白种人为观察组(组I),年龄范围为30～45岁。同期同年龄段的国人为对照组(组II)。使用综合验光仪测定术前戴镜、术后1mo裸眼的NRA,PRA值分别进行统计学比较和分析。结果:同一患者手术前后的相对性调节总量、NRA/PRA值两两比较(配对t检验),无显著性差异。两组患者手术前后的调节总量、NRA/PRA值。两组间比较,术前、术后的相对调节总量、PRA值有显著性差异(前者P<0.05,后者P<0.01),组I的绝对值高于组II。而NRA值比较无显著性差异。结论:近视患者LASIK手术前后NRA,PRA值的改变没有统计学意义。NRA值随患者年龄增大而相应增高。

AIM：To study the differences before and after laser in stiukeratomileusis（LASlK） in the positive and negative relative accommodation（PRA and NRA） between Chinese and Caucasian and explore its referential meaning for surgical design.·METHODS：The PRA and NRA were measured in 50 myopic patients,22 Caucasian（Group Ⅰ） and 28 Chinese（Group Ⅱ）,aged between 30 and 45,before and 1 month after LASIK.·RESULTS：The total relative accommodation,PRA and NRA of every individual（before and 1 month after LASIK） had no significant difierence.The total relative accommodation（P〈0.05） and PRA（P〈0.01） in Chinese was significantly different from those of Caucasian,both preoperatively and postoperatively.But there was no significant diference of NRA.·CONCLUSlON：Before and after LASIK,the changes of NRA and PRA seem to be not statistically significant.With the increase of age,NRA value increases correspondingly.