Quantitative measurement of the central corneal thickness and anterior chamber angle before and after phacoemulsification by Oculyser

Abstract

Objective To evaluate the changes of central corneal thickness (CCT) and anterior chamber angle depth (ACAD) before and after the phacoemulsification with posterior intraocular lens implantation through the eye anterior segment analysis system (Oculyser).Methods Sixty eyes of 60 patients with cataract treated by phacoemulsification with posterior chamber intraocular lens implantation were enrolled in this study,including 34 patients (34 eyes) without diabetes (senile cataract group) and 26 patients (26 eyes) with diabetes (diabetes group).Then all patients with cataract were divided into 3 groups by age:60 ～ 65 years old group,66 ～ 75 years old group,and over 76 years old group with 20 patients (20 eyes) in each group.The CCT and ACAD were examined by oculyser preoperatively and 3 d,7 d,and 1 month postoperatively.Results (1) CCT:In the diabetes group,senile cataract group,and each age group,the CCT was significantly increased at 3 d,7 d postopratively compared with that of preoperative CCT (t =4.799 ～ 10.519,t =5.593 ～ 11.059,P ＜0.05).The CCT at 1 month postoperatively was not significantly different from the baseline (t =1.441 ～ 3.126,P ＞0.05).Moreover,patients in diabetes group showed higher CCT compared with those in senile cataract group at 3 d,7 d (t =2.282,t =2.077,P ＜ 0.05) but not different at 1 month after surgery (t =0.792,t =1.367,P ＞ 0.05).CCT in each age group did not show significant differences among preoperative and postoperative 3 d,7 d,1 month (t =0.295 ～ 1.719,P ＞0.05).(2) ACAD:the ACAD was significantly increased after operation 3 d,7 d,1 month (t =6.281 ～11.869,t =7.926 ～ 10.939,t =8.504 ～ 12.912,P ＜ 0.05),but there were no significant differences be-tween patients with and without diabetes at different timepoints (t =0.056 ～ 0.980,t =0.003 ～ 1.098,P ＞ 0.05).(3) The negative correlation was shown between the CCT and ACAD (r =-0.330,P =0.010).Conclusion The Oculyser can observe the changes of CCT and ACAD before and after cataract phacoemulsification with posterior chamber intraocular lens implantation objectively and accurately. Key words: Oculyser; Cataract ; Thickness, central, corneal; Depth, angle, chamber, anterior