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Femtosecond laser-assisted arcuate keratotomy (femto-AK) for high post-keratoplasty astigmatism

Poster Details

First Author: S.Kwitko BRAZIL

Co Author(s):    B. Schneider De Araujo                    

Abstract Details


High astigmatism is the main cause of failure in visual rehabilitation after keratoplasty. In cases where only the astigmatism is the limiting fator, AK may represent an interesting option. Compared to manual incisions, femto-AK are more precise and theoretically may present better results. We report herein our experience with femto-AK to treat high post-keratoplasty astigmatism.


Oftalmocentro (private clinic), Porto Alegre/Brazil.


Retrospective analysis of 17 consecutive patients with at least 5.0 D of post-keratoplasty astigmatism that underwent femto-AK (IFS 150 Intralase Abbott) from May 2014 to July 2015.


Mean topographic cylinder reduced from 8.94 �Â�± 2.27D to 5.02 �Â�± 4.7 (P<0.05) at 6 months postoperatively. BSCVA increased from 0.39 �Â�± 0.22 preoperatively to 0.52�Â�±0.08 (P<0.05). In 9 cases (53%) occurred some type of complication: perforation in 2, overcorrection in 6, and no reduction of astigmatism in one. Cases with overcorrection were managed with compressive sutures with good result.


Unlike other studies, we did not have good results performing femto-AK in post-keratoplasty eyes. In our experience, the topographic results were not predictable, with a non acceptable complication rate. Therefore, we do not perform femto-AK anymore for the treatment of high post-keratoplasty astigmatism.

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