Intraoperative Size Variation of Femtosecond Laser Capsulotomy
Purpose
To study changes in the size of capsulotomy created by the femtosecond laser during the course of surgery.
Methods
Fifty eyes that underwent femtosecond laser assisted cataract surgery with Alcon Lensx had the capsulotomy diameters measured horizontally and vertically with respect to the corneal diameter (to account for magnification) at the start and completion of surgery. The changes in the diameters of the capsulotomy margin along both axes were analyzed.
Results
There was expansion of the capsulotomy more in the vertical direction than horizontal towards the end of surgery with an average expansion of 0.2 mm in the vertical direction and 0.1 mm in the horizontal axis.
Conclusion
The sizing of the capsulotomy during femtosecond laser determines the overlap after intraocular lens placement. Towards this end, the capsulotomy should be planned smaller than desired.