Influence of the incisions of cataract surgery on corneal aberrations

Influencia de las incisiones de la cirugía de catarata en las aberraciones corneales

By: J. Queiruga, A. Gargallo, J. Arines, F. González

Main Information

Volume:
Vol.48-N1 / 2015 - Ordinario
Section:
Vision Sciences
Pages:
19-30
DOI:
http://dx.doi.org/10.7149/OPA.48.1.19
Type:
Introduction to Research/Introducción a la Investigación
Language:
Spanish / Español
Attachments:
Keywords:
Aberrations, Cataract surgery, 1 incision, Paired incisions, Sirius, Corneal topography.

Aberraciones, cirugía de catarata, 1 incisión, incisiones pareadas, Sirius, topografía corneal
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Abstract

The aim of this work is to study the effects produced by 1 incision and paired incisions in corneal aberrations after cataract surgery. We selected 21 eyes of 18 patients aged between 44 and 89 years (69,81 ± 12.55). Aberrations were measured by corneal topographer Sirius 5 eyes with incisions paired (3 mm) and 16 eyes 1 corneal incision (2.2 mm). Data of topography, RMS values, and Zernike coefficients to 4th order were obtained a week before and 3-4 weeks after surgery for a pupil diameter of 6 mm. Corneal astigmatism was reduced with paired incisions (pre 0.94 ± 0.44 D, post 0.90 ± 0.48 D) (P =0.26) and increased with an incision (pre 1.29 ± 1.28 D, post 1.34 ± 1.45 D) (P = 0.77) Although differences were no statistically significant. The total RMS average increased with paired incisions (pre 1.16 ± 0.39 µm, post 1.24 ± 0.34 µm) (P = 0.46) and decreased with an incision (pre 1.76 ± 1.47 µm and post 1.54 ± 1.58 µm) (P = 0.91) after surgery. Higher order aberrations increased with paired incisions and decreased with 1 incision. The comma (pre 0.40 ± 0.19 µm, post 0.40 ± 0.30 µm) with paired incisions and spherical aberration (pre 0.31 ± 0.24 µm, post 0.31 ± 0.18 µm) with 1 incision showed no change post-surgical. These two types of incisions, although they induce changes after cataract surgery in aberrations corneal as clover, coma, astigmatism, tetrafoil, secondary astigmatism and spherical aberration, not impaired significantly the optical quality of the corneal surface.


El objetivo de este trabajo es estudiar los efectos producidos por 1 incisión e incisiones pareadas en aberraciones corneales tras cirugía de catarata. Se seleccionaron 21 ojos de 18 pacientes con edades comprendidas entre 44 y 89 años (69,81 ± 12,55). Las aberraciones fueron medidas mediante el topógrafo corneal Sirius en 5 ojos con incisiones pareadas (3 mm) y en 16 ojos con 1 incisión corneal (2,2 mm). Se obtuvieron datos de topografía, RMS y coeficientes de Zernike hasta 4 2 orden, una semana antes y 3-4 semanas tras la cirugía para un diámetro pupilar de 6 mm. El astigmatismo corneal se redujo con incisiones pareadas (pre 0.94 ± 0,44 D, post 0,90 ± 0,48 D) (P = 0.26) y aumentó con una incisión (pre 1.29 ± 1,28 D, post 1.34 ± 1,45 D) (P = 0.77) aunque las diferencias no fueron estadísticamente significativas. El promedio de RMS total aumentó con incisiones pareadas (pre 1.16 ± 0,39 µm, post 1.24 ± 0.34 µm) (P = 0,46) y disminuyó con una incisión (pre 1.76 ± 1.47 µm y post 1,54 ± 1,58) (P = 0,91) después de la cirugía. Aberraciones de alto orden aumentaron con incisiones pareadas y disminuyeron con 1 incisión. El coma (pre 0.40 ± 0,19 µm, post 0,40 ± 0.30 µm) con incisiones pareadas y la aberración esférica (pre 0,31 ± 0.24 µm, post 0,31 ± 0.18 µm) con 1 incisión no mostraron cambios post quirúrgicos. Estos dos tipos de incisiones, aunque inducen cambios después de la cirugía de catarata en aberraciones corneales como trébol, coma, astigmatismo, tetrafoil, astigmatismo secundario y aberración esférica, no deteriora de manera significativa la calidad óptica de la superficie corneal.

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