| Popis: |
Purpose Every IOL formula has its limits in estimating Effective lens position (ELP). The main one is the variability in capsulotomy size and centration. Our purpose was to compare the variability and predictability in ELP based on capsulotomy created by a femtosecond laser with those using manual continual curvilinear capsulorhexis. Methods 32 eyes from 24 patients undergoing cataract surgery had either femtosecond created 5.2 mm capsulotomy (VICTUS™ Femtosecond Laser Platform - Technolas Perfect vision) (n=16) or manual continuous curvilinear capsulorhexis performed with an attempted diameter of 5.2 mm (n=16). One surgeon performed all the surgeries during a period of one month in April 2012, at Percy military hospital, Clamart. Three type of monofocal IOL were implanted in the bag. At one month after surgery, ELP was measured by Pentacam HR and compared to preoperative estimated lens position. Accuracy to target refraction was also calculated, being the difference between target refraction with Iolmaster v5 (Haigis, SRK/T and Holladay formula) and postoperative objective refraction Results Precision of IOL position was improved, as shown by statistically significant reduced variability of ELP (0,27 vs 0,45, p=0,03) in the laser group at one month. Better accuracy to target refraction using SRK/T formula (0,16 vs 0,5, p=0.02) and Holladay formula (0,26 vs 0,50, p=0,02) was also observed in the laser-treated eyes compared to the manual group. Conclusion Femtosecond laser system provides a perfectly round, well-centered, and precise diameter capsulotomy. In this study, this translated to more accurate and predictable ELP and IOL power calculation in femtosecond laser group compared to manual group. |
Plný text