Impact on corneal astigmatism and visual acuity in phacoemulsification guided by IOL Master

Objective To study and analyze the impact on corneal astigmatism and visual acuity during individualized phaeoemulsification with intraocular lens implantation guided by IOL Master. Methods Thirty-eight patients （50 eyes） were treated with phacoemulsification through 3.0mm clear corneal incision with the steepest meridian according to IOL Master （group A） or auto-refractor/A-scan （group B）. All patients were divided randomly and equally. The corneal astigmatism and visual acuity between group A and B were compared after the operation. Results The astigmatism of group A, B were （1.01± 0.10）D and （0.95 ± 0.13）D before operation, （1.33± 0.13）D and （1. 25 ± 0.15）D 1 day after operation, （1.15± 0.14）D and （1.07 ± 0.13） D after 1 week, （0.90 ± 0.13）D and （0.87 ± 0.12）D after 1 month, （0.89± 0.12）D and （0.80± 0.11）D after 3 months, respectively. There was no significant difference in the estimated values of astigmatism before and after operation （P 〉0.05）, so between the methods of IOL Master and auto- refractor （P 〉0.05）. In group A the naked visual acuity above 0.8 were 8 eyes 1 month, and 10 eyes 3 months after operation, better than group B with 2 eyes and 3 eyes. There was significant difference in the estimated values of visual acuity between the methods of IOL Master and A-scan （P 〈0.05）. Conclusions Individualized phaeoemulsification with intraocular lens implantation guided by IOL Master can reduce corneal astigmatism and improve the visual impact. Key words: IOL Master;  Phacoemulsification;  The steepest meridian;  Corneal astigmatism;  Visualacuity.