Irregular Astigmatism After Corneal Transplantation—Efficacy And
CLINICAL SCIENCE Irregular Astigmatism After Corneal Transplantation—Efficacy and Safety of Topography-Guided Treatment Inês Laíns, MD, MSc,*† Andreia M. Rosa, MD,*† Marta Guerra, MD, MSc,* Cristina Tavares, MD,* Conceição Lobo, MD, PhD,*† Maria F. L. Silva, PhD,‡ Maria J. Quadrado, MD, PhD,*† and Joaquim N. Murta, MD, PhD*† Key Words: astigmatism, corneal topography, corneal transplanta- Purpose: fi To analyze the ef cacy and safety of topography-guided tion, excimer, photorefractive keratectomy photorefractive keratectomy (TG-PRK) to treat irregular astigmatism after corneal transplantation. (Cornea 2016;35:30–36) Methods: This was a retrospective observational case series. Eyes with irregular astigmatism after penetrating keratoplasty treated with orneal transplantation (CT) is one of the most commonly TG-PRK (Allegretto Wave Eye-Q) with the topography-guided Cperformed transplant procedures throughout the world.1 customized ablation treatment protocol were included. All treatments Although it is generally successful, patients frequently present had been planned to correct the topographic irregularities, as well as with high irregular postoperative astigmatism, which pre- to reduce the refractive error after neutralizing the induced refractive cludes them from achieving satisfactory visual acuity.2 It can change. Clinical records, treatment plan, and the examinations affect up to 40% of the eyes3 and remains a challenge even for performed were reviewed and the following data were collected: experienced cornea specialists, as spectacles and rigid contact corrected and uncorrected distance visual acuities; manifest refrac- lenses often represent an unsuccessful option for visual tion; topographic parameters, and corneal endothelial cell count. rehabilitation.4 Results: We included 31 eyes [30 patients; mean age 45.0 6 13.4 In recent decades, excimer laser treatment has emerged 5 (SD) years].
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