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Ultrasound time is not associated with intraocular pressure reduction after FLACS

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Session Details

Session Title: FLACS II

Session Date/Time: Monday 07/09/2015 | 14:30-16:00

Paper Time: 15:30

Venue: Room 16

First Author: : H.Abouzeid SWITZERLAND

Co Author(s): :    W. Ferrini   M. Bochud   F. Behar-Cohen              

Abstract Details


Phacoemulsification lowers intraocular pressure (IOP) postoperatively. Ultrasounds could play a role inducing a change in the trabecular filtration rate. Femtolaser assisted cataract surgery (FLACS) is thought to use less ultrasound than standard phacoemulsification. Our purpose is to quantify change in IOP after phacoemulsification in FLACS.


Jules-Gonin Eye Hospital, University Department of Ophthalmology, Lausanne, Switzerland


IOP measured preoperatively and at 6 months with Goldmann tonometry in FLACS patients (n=141), time at which pressure was taken and ultrasound use parameters were collected. Linear regression was performed to explore association of change in IOP with time of measure, ultrasound use (ultrasound time and effective phaco time), sex, and age.


There was a mean decrease in intraocular pressure of 2.5mmHg (CI 95% -3.6;-1.4, p<0.001) postoperatively. Mean (SD) US time was 23.2 (11.1) sec, and mean (SD) effective phaco time was 11.3 (8.0) sec. No association between the change in intraocular pressure and ultrasound time (p=0.41) or effective phaco time (p=0.66) was observed when analyzed one-at-a-time or in a multiple linear regression model. Sex, age, nuclear density, presence of pseudoexfoliation, and time of ocular pressure measurement were not associated either.


There was a similar decrease in intraocular pressure 6 months after FLACS in our study than in published literature for standard phacoemulsification. The use of ultrasound may not influence the size of the decrease. FLACS may be as valuable as standard phacoemulsification for cases where IOP reduction is needed postoperatively.

Financial Interest:


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