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Corneal incision position during femtosecond cataract surgery (FLACS)

Poster Details

First Author: C.Bala AUSTRALIA

Co Author(s):    T. Thomas   A. Siu   K. Meades              

Abstract Details


To compare the expected vs actual incision positions during FLACS. To investigate the factors affecting the incision position during FLACS.


PersonalEyes, Sydney


A retrospective study of patients undergoing LenSx FLAC surgery was performed. The video recordings of the surgery were examined to determine the location of the internal opening, external opening and width of the primary and secondary corneal incisions. The extent to which they differed from the ideal was measured. The various factors such as anterior chamber depth, keratometry, anterior chamber depth, axial length and ocular rotation were determined.


The superior and inferior secondary incisions were displaced by 300 microns centrally in most patients. The amount of displacement varied significantly with the rotation of the eye (p<0.001). Multivariate analysis showed that the position of the superior incision varied significantly with ACD (p=0.03) and eye rotation(p<0.0001; R Square 0.77), while the inferior incisions was only affected by eye rotation (p,0.001; R Square 0.85). The main incision and the width of the various incisions were not affected.


Ocular rotation has a significant impact on incision placement and has to factored into incision planning.

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