Topographic Changes After Smartsight With The Schwind Atos Femtosecond Laser System

To evaluate changes in corneal measured keratometry values 3-months after myopic lenticule extraction on the Schwind ATOS femtosecond platform and their relation to change in manifest refraction from the attempted myopic correction.

University Eye Clinic Svjetlot, Zagreb

Case series of 60 eyes undergoing uneventful SmartSight lenticule extraction all performed by the same experienced surgeon (MB) was analyzed using the CSO MS39 AS-OCT with Placido topography and Pentacam. Data were assessed for normality using the Shapiro-Wilk test

The 60 analyzed eyes were followed up for a minimum of 3 months. At 3M, the scattergram of achieved change in keratometry readings vs. attempted refractive correction of the SEQ showed a very good correlation, with 68% eyes within 0.5D from target. The scattergram of achieved change in keratometry readings vs. attempted refractive correction of the astigmatism showed only a low correlation, with 59% eyes with postoperative corneal toricity of 1D or less. The angle of error was within 25deg from attempted astigmatism axis in 42% of the eyes.

Lenticule extraction treatment using SmartSight is safe and efficacious in the first 3-months postoperatively. The post-operative outcomes indicate improvements in vision. There is a clear correlation between the keratometry changes and the achieved refractive outcomes.