NGHIÊN CỨU ĐẶC ĐIỂM TỔN THƯƠNG HẮC VÕNG MẠC QUANH ĐĨA THỊ TRÊN LÂM SÀNG VÀ CHIỀU DÀY LỚP SỢI THẦN KINH QUANH ĐĨA THỊ TRÊN OCT Ở MẮT CẬN THỊ CAO

Abstract

Objective: To assess the characteristic of choroidal retinal damage around the optical disc in clinic, the nerve fiber layer thickness around the optical disc by OCT in high and risk factors. Methods: A cross-sectional study on 168 eyes of 88 patients with high myopia was conducted between January 2020 and August 2020 at the Refraction Department of Vietnam National Institute of Ophthalmology. Results: the number of eyes with choroidal retinal damage around the optical disc was 118 eyes (70.2%). The average thickness of the nerve fiber layer around the optical disc was 88.21 ± 8.74μm, in which the thickness of the nerve fiber layer around the optic disc in the eyes with choroidal retinal damage around the optical disc (86.39±8.04μm) was thinner than this of the eyes without the damage (92.52±8.92μm), the difference was statistically significant (p<0.01). The longer of myopia duration, the higher of myopia level, and the longer of axis length, the risk of choroidal retinal damage around the optical disc was higher. The higher of myopia level, the thickness of the nerve fiber layer around the optic disc was thinner. Conclusions: In high myopic eyes, three factors: the duration of myopia, the degree of myopia, and the axis length were associated with choroidal retinal damage around the optical disc. The thickness of the nerve fiber layer around the optic disc in the eyes with choroidal retinal damage around the optical disc was thinner than this of the eyes without the damage. Myopic level factors are associated with the thickness of the nerve fiber layer around the optical disc.