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Femtosecond laser capsulotomy yields less tilt, decentration than manual capsulorrhexis
Femtosecond laser-enabled capsulotomy resulted in more accurate IOL placement and better visual outcomes than the conventional manual capsulorrhexis technique, a study found.
“Continuous curvilinear capsulorrhexis created with a femtosecond laser resulted in a more stable refractive result and less IOL tilt and decentration than manual CCC,” the study authors said.
The prospective, randomized analysis included 20 eyes of 20 patients that underwent laser CCC with the LenSx femtosecond laser (Alcon) and 25 eyes of 25 patients that underwent manual CCC.
Investigators used the Pentacam Scheimpflug camera (Oculus) to measure IOL decentration and tilt 1 year postoperatively. They analyzed postoperative uncorrected and corrected distance visual acuity and manifest refraction.
Between-group differences in IOL decentration and tilt, the correlation between IOL decentration and refractive changes, and the association of IOL tilt with visual acuity were also examined.
Study results showed that the manual CCC group had significantly greater horizontal tilt (P = .007) and vertical tilt (P < .001) than the femtosecond laser CCC group. The manual group also had significantly greater horizontal decentration (P = .034) and total decentration (P = .022) than the laser CCC group.
Data showed a significant correlation between total IOL decentration and changes in manifest refraction at 1 month and 1 year postop.
Vertical tilt and corrected distance visual acuity were strongly associated, the authors said.