| 목적 : To evaluate the effect of myopia and age on temporal optic disc margin anatomy within the parapapillary atrophy (PPA) area using spectral-domain optical coherence tomography (OCT).방법 : Fifty young non-myopic eyes without PPA (control group), 50 young myopic eyes with PPA (myopic PPA group), and 50 aged non-myopic eyes with PPA (aged PPA group) were enrolled. Horizontal cross-sectional optic nerve head (ONH) images were obtained using high-definition OCT scans. By using the OCT scans, the following temporal optic disc margin structures were investigated: 1) the configuration of border tissue of Elschnig, 2) cross-sectional ONH structure coinciding with the clinically detected optic disc margin, and 3) integrity of retinal layers within the PPA area.결과 : The distribution of configuration of border tissue of Elschnig and cross-sectional ONH structure coinciding with the clinically detected optic disc margin was different between control group and myopic PPA group (P < 0.01); however, there was no difference in these structures between control group and aged PPA group (P > 0.05). The retinal layers within the PPA area were more commonly impaired in the myopic PPA group than in the aged PPA group (P < 0.001), except for the integrity of photoreceptor layer.결론 : Myopia and aging showed different structural changes in temporal optic disc margin anatomy within the PPA area. This finding implies that different mechanisms may underlie myopic and age-related PPA development. |