Analysis of corneal astigmatism correction by femtosecond laser intrastromal arcuate incisions following calculations by the computer software Optimeyes for predicting changes in corneal topography

Session Details

Session Title: Femtolaser-Assisted Cataract Surgery (FLACS)

Session Date/Time: Monday 16/09/2019 | 08:30-10:30

Paper Time: 08:36

Venue: Free Paper Forum: Podium 4

First Author: : H.Kraker AUSTRIA

Co Author(s): :    B. Baca   E. Businaro   H. Studer   V. Steiner   K. Motloch   H. Reitsamer              

Abstract Details

Purpose:

Low and medium grade corneal astigmatism is very common. Facing the higher patient expectation and the common request to be glasses-free the correction of astigmatism is becoming increasingly important, especially in combination with cataract surgery. Currently valid nomograms show unpredictable aberrations and outliers which may be reduced and optimised by the new software.

Setting:

University hospital eye department in Salzburg, Austria

Methods:

40 eyes with natural occuring low to medium astigmatism (0.5 – 1.75dpt) and cataract were treated with the Catalys femtosecond laser undergoing femtosecond-laser-assisted-cataract surgery with additional intrastromal arcuate keratotomy. The parameters of these laser incisions were calculated by the new Optimeyes software, based on patient-specific biomechanical simulations. Pre- and postsurgical parameters were measured by Pentacam HR Scheimpflug camera (Oculus Optikgeräte GmbH, Germany). As target value we aimed for mild undercorrection of the residual astigmatism.

Results:

3 months follow-up results suggest that in comparison the statistical based nomograms, the individualized planning reduced variability in outcome and residual astigmatism.

Conclusions:

Biomechanical simulation-based optimization of surgical parameters for intrastromal arcuate keratotomy in low to medium astigmatism leads to more reliable postoperative astigmatism and limits the risks of overcorrection.

Financial Disclosure:

gains financially from product or procedure presented, is employed by a for profit company with an interest in the subject of the presentation