Evaluation of Corneal Higher-Order Aberrations in Syrian Children with Different Refractive Errors

Abstract

Background & Aim: The research aims to discover the changes in the RMS values ​​of the most important higher-order aberrations (Coma, Trefoil, Spherical Aberration) in Syrian children population with different refractive errors (emmetropia, myopia & hyperopia)

Materials and methods: A cross-sectional study that included 414 eyes of 207 patients ,ages  8-14 years, who attended ophthalmological clinics at Al-Mowasat University Hospital in Damascus during the period from Mars 2021 until February 2022, where a comprehensive eye examination was performed, Then corneal topography was performed using Sirius device  to study the most important corneal aberrations(Coma, Trefoil, Spherical Aberration) with a pupil diameter of 6 mm, then data were collected and analyzed statistically.

Results: RMS of Coma and Spherical Aberrations peaked in the hyperopia group (0.06±0.17, 0.04±0.11) respectively and Spherical Aberration lowest value was in the mild myopia group (0.03±0.05). Whereas,Trefoil was higher in the moderate and severe myopia group (0.05±0.21)

Conclusions: In this study we found a significant increase in Trefoil in moderate and severe myopia ,a significant increase in Spherical Aberration and Coma in hyperopia and a significant decrease in spherical aberration in mild myopia compared to emmetropia and other groups. Spherical aberration might has a role in myopia development.

Keywords:  Corneal Higher-Order Aberrations,  Coma,  Spherical Aberration,  Trefoil,  Refractive Errors.