Cataract Surgery On Corneal Endothelial Cell Damage

First Part: The Mechanism of Corneal Endothelial cells Lesion During Phacoemulsification and AspirationObjective: To evaluate the proportions of corneal endothelial lesion caused by different factors during phacoemulsification and aspiration. Methods: fourteen cats(twenty eight eyes) were divided into four groups. The processed factors were ultrasonic power, lens extraction by phacoemulsification or not, and lens extraction using different level of ultrasonic power. The density of central corneal endothelial cells was measured before and after operation.Results: In releasing ultrasonic power only without lens extraction group, there was no significant difference in density of central corneal endothelial cells between pre-operation and post-operation. But in the lens extraction group, there was difference in density between pre-operation and post-operation, and the higher level of ultrasonic power was used, the more the central corneal endothelial cells density decreased through operation.Conclusion: The primary factor which causes corneal endothelial lesion during phacoemulsification and aspiration procedure is debris of lens nucleus, and the other factors just in very small degree cause the lesion of corneal endothelium in normal operations.