Analysis of corneal topography after Q-value adjusted customize laser in situ keratomileusis for myopia

Objective To analyze the changes of corneal topography after Q-value adjusted customize laser in situ keratomileusis (LASIK) for myopia. Methods A total of 94 patients (188 eyes) were divided into two groups. Aspherical ablation in LASIK was performed for 94 eyes of group one, and standard ablation was performed for 94 eyes of group two. Checked by Orbscan Ⅱ -z topography System and followed up six months after surgery. Results Ablation shape, the mean decentratien and SimK had not significantly different between the two groups in different periods (P>0.05). The significant difference was seen in Q-value between two groups in different time points in post-operation (P<0.05). Q-value was lower in the aspheric group than the standard group. Postoperative average corneal thickness and ablated depth were statistically significant differences (P<0.05). Conclusions Q-value adjusted customize LASIK is safety, efficacy, stable and the physiology of the corneal surface is better maintained than standard treatment. Corneal topography provides a objective method to evaluate the result of operation. Key words: Q-value; Aspheric ablation;  myopia;  laser in situ keratomileusis;  corneal topography