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Pupil diameter and intraocular pressure after the femtolaser part of cataract surgery

Session Details

Session Title: Cataract I

Session Date/Time: Friday 15/02/2013 | 10:30-12:30

Paper Time: 10:36

Venue: Hall 2

First Author: : R.Bellucci ITALY

Co Author(s): :    M. Cargnoni              

Abstract Details


The femtolaser part of cataract surgery involves the delivery of laser energy close to the pupil border and inside the cataract. This treatment has been suspected to induce miosis and elevation of intraocular pressure. We conducted a study to assess these variations.


Ophthalmic Unit, Department of Neurosciences, Hospital and University of Verona, Italy


A series of 20 eyes operated consecutively with the Victus femtosecond laser were included. Pupil diameter was measured through the cornea before surgery and at the beginning of the surgical part of the procedure. Intraocular pressure was measured at the same time by a rebound tonometer, with the patient sitting. No corneal incision was made by the femtosecond laser in this study. The applied laser energy was recorded and compared with the measurements.


Horizontal pupil diameter was 7.39±0.77 mm before femtosecond laser application, 7.37±0.8 mm during laser treatment, and 7.33±0.72 mm before the beginning of phaco surgery. The difference of -0.065±0.187 mm had neither clinical nor statistical significance. Intraocular pressure was 15.25±1.9 mmHg before docking, and was 15.0±1.5 after femtolaser application (P=N.S.). Total employed energy including lens fragmentation was 14.415±0.067μJ, with minimal variation across eyes.


Pupil diameter and intraocular pressure did not change with the femtolaser part of cataract surgery in this study. The low level of applied energy suggests different results may be obtained with different lasers and higher energy.

Financial Disclosure:

... receives consulting fees, retainer, or contract payments from a company producing, developing or supplying the product or procedure presented

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