Femtosecond Laser-Assisted Intrastromal Astigmatic Keratotomy for the Treatment of Astigmatism Post-Penetrating Keratoplasty: 6- Month Outcomes of a Prospective Interventional Case Series World Cornea Congress VII – Electronic Poster Season Tse Wing Yeung, MBBS, FRANZCO Ronan Conlon, MD; Joshua Teichman, MD, FRCSC; Setareh Ziai, MD, FRCSC; George Mintsioulis MD, FRCSC; Kashif Baig, MD, MBA, FRCSC The University of Ottawa Eye Institute Dr. Baig is a consultant for Alcon, Allergan, Bausch & Lomb, Labtician. Dr. Yeung, Dr. Conlon, Dr. Teichman, Dr. Ziai, Dr. Minsioulis have no financial interests in the subject matter of this presentation.
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World Cornea Congress VII – Electronic Poster Season Tse Wing Yeung, MBBS, FRANZCO Ronan Conlon, MD; Joshua Teichman, MD, FRCSC; Setareh Ziai, MD, FRCSC;
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Femtosecond Laser-Assisted Intrastromal Astigmatic Keratotomy for the Treatment of
Astigmatism Post-Penetrating Keratoplasty: 6- Month Outcomes of a Prospective Interventional
George Mintsioulis MD, FRCSC; Kashif Baig, MD, MBA, FRCSC The University of Ottawa Eye Institute
Dr. Baig is a consultant for Alcon, Allergan, Bausch & Lomb, Labtician. Dr. Yeung, Dr. Conlon, Dr. Teichman, Dr. Ziai, Dr. Minsioulis have no financial interests in the subject matter of this presentation.
Introduction Visual rehabilitation post-penetrating keratoplasty (PKP) can be
difficult due the the high magnitude of astigmatism (up to 5D), which may not be correctable with glasses or contact lenses (38%)1
A number of corneal techniques have been described to address this problem including astigmatic keratotomy (AK)
The precision and accuracy of arcuate incisions in AK have significantly improved with the incorporation of femtosecond laser technology
Recent case reports have shown that femtosecond laser-assisted intrastromal astigmatic keratotomy (FISAK) is efficacious in the management of astigmatism in PKP patients2 1. Cleary, C et al. (2013) Cornea 32:54-622. Viswanathan, D (2013) JCRS 39:1916-20
Purpose
The purpose of this study is to report the outcomes of the correction of astigmatism with femtosecond laser-assisted intrastromal astigmatic keratotomy (FISAK) in patients with previous PKP
Methods
Prospective non-randomized interventional case series Inclusion criteria:
• Patients who had significant astigmatism following PKP• Complete suture removal at least 1 month prior to the procedure• Contact lens intolerance• Stable refraction
Paired intrastromal arcuate incisions were created with a femtosecond laser (IntraLase™; AMO)
Multiple postoperative visits were scheduled during the 6-month follow up period
Methods
• At each study visit, data as outlined were recorded: uncorrected visual acuity (UCVA) and best-corrected visual acuity (BCVA), slit lamp microscopy, IOP, manifest refraction, corneal topography, and anterior segment OCT
• The primary outcomes of the study were postoperative UCVA and BCVA
• The secondary outcomes were the reduction of refractive and topographic cylinder
• Intra-operative and postoperative complications were also documented