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Femtosecond laser-assisted implantation of toric MIOL based on automated corneal shape analysis in comparison with a manual technique

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Session Details

Session Title: Presented Poster Session: FLACS & Others

Venue: Poster Village: Pod 1

First Author: : P.Hagen GERMANY

Co Author(s): :    D. Breyer   H. Kaymak   K. Klabe   F. Kretz   G. Auffarth  

Abstract Details

Purpose:

By shape analysis of anterior and posterior corneal surface combined with iris detection, the preoperatively measured steep corneal axis can be marked during cataract surgery by a femtosecondlaser in a way that compensates cyclorotation. Using these landmarks in aligning the toric IOL this new technique aims for a better correction of astigmatism during femtosencondlaser-assisted cataract surgery (FLACS). The aim of this retrospective analysis was to compare the astigmatic outcome of this new approach with a manual technique in consequtive cases without selection.

Setting:

All surgeries were performed at the Breyer-Kaymak-Klabe Eyesurgery in Duesseldorf, Germany, which is part of the International Vision Correcton Research Center (IVCRC.net). All considered eyes underwent cataract surgery or refractive lens exchange with a bifocal toric Comfort IOL (+1.5D addition, Oculentis).

Methods:

We compared the results of two groups: Group A: 85 eyes that underwent FLACS with axis alignment by corneal shape analysis combined with automated iris registration the data link between Cassini (i-Optics) and LensAR with IntelliAxis (Topcon), Group B: 54 eyes treated with the manual technique: YAQ laser epithelial marking of the horizontal axis and alignment of the toric IOL via a screen transparency (STACY by Deltev Breyer and CZM). We measured manifest refraction and evaluated the reduction of astigmatism using the vector-based Alpins method. Results for angle of error, difference vector, correction index and index of success were compared.

Results:

The correction index in group A and B was 0.99+-0.22 and 1.08+-0.30 and the index of success was 0.29+-0.30 and 0.33+-0.31, respectively.

Conclusions:

From our data analysis we see slight but non-significant advantages in the reduction of astigmatism in the group with FLACS and automated compensation of cyclorotation. However, data transfer, workflow and prevention of read-off errors is better with IntelliAxis.

Financial Disclosure:

receives consulting fees, retainer, or contract payments from a company producing, developing or supplying the product or procedure presented, travel has been funded, fully or partially, by a competing company, travel has been funded, fully or partially, by a company producing, developing or supplying the product or procedure presented, receives consulting fees, retainer, or contract payments from a competing company

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