The diameter of laser capsulotomy changes axial IOL position determined by Lenstar interferometry and quantitative anterior segment ultrasound biomicroscopy (AS-UBM)

Session Details

Session Title: Laser-Assisted Cataract Surgery (Femto and Other Types of Lasers)

Session Date/Time: Monday 12/09/2016 | 14:00-15:30

Paper Time: 14:06

Venue: Hall C3

First Author: : P.Fedor USA

Co Author(s): :    M. Martin   A. Fedor   D. Fedor              

Abstract Details

Purpose:

To determine the effect of the laser and manual capsulotomy diameter and overlap over the IOL optic on the axial position of the IOL and refractive outcome.

Setting:

Anterior segment private practice

Methods:

This retrospective intraindividual study comprised 50 eyes of 25 patients after cataract surgery with more than 180 degrees (50%) difference in the amount of the capsulotomy overlap over the IOL optic in the right eyes as compared to the left eyes. Pseudophakic anterior chamber depths were measured using Lenstar interferometry, anterior segment ultrasound biomicroscopy (AS-UBM), immersion and contact Ascans. Postoperative refractions and errors of predicted refractions of IOL power calculation formulas were compared in the right and left eyes of patients with similar ocular biometry that only differed in the amount of the capsulotomy overlap over the IOL optic.

Results:

The mean overlap of the capsulotomy over the IOL was 81% +/- 18% in group 1 with smaller capsulotomy and 8% +/- 14% in group 2 with the larger capsulotomy. The difference between the overlap of the capsulotomy over the IOL optic was 72 % +/- 19% between groups 1 and 2. Larger capsulotomy with less overlap over the IOL optic compared to a smaller capsulotomy with a larger overlap of the IOL optic is associated with an average anterior displacement of the IOL optic of 0.24 mm and an average myopic shift of 0.5 D.

Conclusions:

Our intraindividual study of the effect of the laser and manual capsulotomy on the postoperative refraction after cataract surgery compared right to left eyes with similar ocular biometry where the only difference was the size of the capsulotomy. The overlap of the capsulotomy has a clinically significant effect on the postoperative axial position of the IOL.

Financial Disclosure:

NONE