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Karla Alejandra Ramirez Collazo, Oscar Baca, Regina Velasco, Alejandro Babayan, Cristina Pacheco Del Valle, Elisa Dessire Alegria, Oscar Fernandez, Hospital de la Luz; Post keratoplasty astigmatism in a 5 years period. Invest. Ophthalmol. Vis. Sci. 2014;55(13):1554.
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© ARVO (1962-2015); The Authors (2016-present)
To determine the amount of astigmatism after penetrating keratoplasty in a 5 year period at the Fundación Hospital Nuestra Señora de la Luz, IAP.
This is a retrospective cross-sectorial study. Patients with penetrating keratoplasty (PK) in a period of five years at the Fundación Hospital Nuestra Señora de la Luz, IAP were included. The amount of astigmatism, sphere, spherical equivalent (SE), visual acuity (logMar) and best corrected visual acuity (BCVA), before and after PK were reviewed. We classified patients into four groups: Group1: Patients with hyperopia, group 2 patients with mild myopia ( < - 3.00 D ), group 3 patients with moderate myopia ( -3.00 D to - 6.00) and group 4 patients with high myopia (greater than > -6.00 D). Suture removal began at month 6 in all patients. Protocol of removal with topography was done.
Four hundred and twelve files were reviewed, 35 eyes, of patients had a complete record (8.49%). In group 1 the preoperative (SE) average was + 4.07 D ± 1.70 (n=7) and + 2.02 D ± 1.45 (n=5) in the postoperative period, group 2: - 2.62 D ± 0.53 (n=2) and - 1.85 D ± 0.95 (n=7), group 3: -4.75 D ± 1.21 (n = 6) and -4.53 D ± 0.69 (n = 17), Group 4: -13.16 D ± 5.09 (n = 20) and -9.30 D ± 1.95 (n = 7), respectively. Patients after one year of surgery were cataloged. In group 1 were included 20% in the preoperative and 14.28% in the postoperative, in group 2 were 5.71% preoperative and 17.14 % in the postoperative, in group 3 were 17.14% preoperative and 48.57% in the postoperative and group 4 were 35% preoperative and 20% in the postoperative. The presence of preoperative astigmatism was in average - 5.47 D ± 2.63 and - 4 .07 D ± 2.05 postoperative. The coefficient of variation was 0.426, for each diopter of astigmatism after surgery, preoperative modified in 0.426 this value with a confidence interval (CI) of 0.195-0.658, (p = 0.001).
The predominant reduction of astigmatism was found in group 3 with 48.57%. After one year of keratoplasty 85% of patients switched their refraction. Our post keratoplasty astigmatism average is comparable with other in training school hospitals.
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