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Effects of femtosecond laser-assisted cataract pretreatment on pupil diameter: a comparison between three laser platforms

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Session Details

Session Title: Presented Poster Session: FLACS

Session Date/Time: Monday 07/09/2015 | 15:00-16:30

Paper Time: 15:20

Venue: Poster Village: Pod 1

First Author: : V.Diakonis USA

Co Author(s): :    N. Yesilirmak   I. Sayed-Ahmed   D. Warren   S. Yoo   K. Donaldson  

Abstract Details


To assess pupil diameter before and after femtosecond laser-assisted cataract surgery (FLACS) pretreatment and compare the outcomes of three laser platforms.


Bascom Palmer Eye Institute, Miller School of Medicine, Miami, Florida, USA


This prospective study included consecutive patients scheduled to undergo cataract extraction using FLACS between August 2013 and February 2015. All eyes received FLACS pretreatment using three laser platforms: Group 1; LenSx, Group 2; Catalys and Group 3; Victus. The same protocol for preoperative medical mydriasis was used for all patients, while pupil diameter was assessed immediately before and three minutes after FLACS.


A total of 198 eyes of 161 patients were included in the study, 68 male and 93 female aged 69.58 ± 10.18 years (range, from 38 to 92 years). Mean pupil miosis was 1.42 ± 1.26 mm (range, from 0 to 4.5 mm), 0.66 ± 0.89 mm (range, from 0 to 5 mm) and 0.14 ± 0.34 mm (range, from 0 to 1 mm), for groups 1, 2 and 3 respectively. Furthermore, 16 out of the 198 eyes (8.1%) demonstrated pupil diameter ≤ 5 mm after FLACS; while, 42 eyes (21.21%) demonstrated pupil diameter ≤ 6 mm. There was a statistical significant decrease (comparison of pre- and post- FLACS) in pupil diameter for all groups individually (p<0.05).


FLACS pretreatment seems to induce significant pupil miosis by all the laser platforms assessed in this study. The decrease in pupil diameter after FLACS reached the clinical significant zone (≤ 5 mm) in 8.1% of cases.

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