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Efficacy of intrastromal arcuate keratotomy (ISAK) created with the Catalys femtosecond laser for the correction of astigmatism

Poster Details

First Author: D.Teenan UK

Co Author(s):                        

Abstract Details


This study evaluates refractive and keratometric and topographic outcomes after the performance of ISAK with a Femtosecond laser in subjects with corneal astigmatism prior to intraocular lens implantation.


Optical Express, Glasgow


69 astigmatic eyes underwent Femtosecond assisted ISAK using the Julian Stevens nomogram. Change in corneal astigmatism, through comparison of pre-operative and post-operative autokeratometry; change in manifest subjective refraction, through comparison of pre-operative and post-operative subjective refraction measurements, and uncorrected and best corrected visual acuity were assessed 3 months after the surgery.


69 eyes of 35 patients with corneal astigmatism up to 2.50D underwent the 3 months post op evaluation.The mean age was 57 7yrs. Mean manifest refractive cylinder pre-operatively was -0.81D 0.66 while at 3 months post-operatively it was -0.57D 0.47


The Intrastromal arcuate keratotomy performed with a femtosecond laser is an effective procedure in the correction of corneal astigmatism.

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