Choroidal Thickness Variation According to Refractive Error Measured by Spectral Domain-optical Coherence Tomography in Korean Children
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Purpose: To assess choroidal thickness (CT) variation according to refractive errors using enhanced-depth imagingoptical coherence tomography. Methods: Eighty-nine eyes (in 89 children) <±6 diopter were categorized into three groups: hyperopia, emmetropia,and myopia, according to refractive error, and underwent choroidal scans using enhanced-depth imaging-optical coherence tomography. CT was measured at the fovea and at 1 mm and 3 mm nasal (N1 and N3),temporal (T1 and T3), superior (S1 and S3), and inferior (I1 and I3) from the fovea. Results: Mean foveal CTs were 346.86 μm, 301.97 μm, and 267.46 μm in the hyperopia, emmetropia, and myopiagroups, respectively (p < 0.05). CTs at N3 and T3 were 214.59 μm and 318.68 μm, 163.92 μm and 320.79μm, and 153.93 μm and 295.61 μm in the hyperopia, emmetropia, and myopia groups, respectively (p < 0.05). All CTs in the hyperopia group were thicker than those of other groups (p < 0.05). Fovea was thickest andwas significantly thicker than at N3 and I3 in hyperopia (p < 0.05). T3 thickness in the emmetropia and myopiagroups was greater than thickness at other areas, particularly the nasal and inferior choroids (p < 0.05). CTwas positively correlated with spherical equivalent (p = 0.029). Conclusions: In Korean children, CTs were greater in the hyperopia group than in the emmetropia and myopiagroups. The temporal choroid was thicker than the nasal choroid, regardless of the refractive error. The thickestlocation in the hyperopia group was the fovea; however, the temporal choroid was thickest in the emmetropiaand myopia groups.
Abstract
Purpose: To assess choroidal thickness (CT) variation according to refractive errors using enhanced-depth imagingoptical coherence tomography. Methods: Eighty-nine eyes (in 89 children) <±6 diopter were categorized into three groups: hyperopia, emmetropia,and myopia, according to refractive error, and underwent choroidal scans using enhanced-depth imaging-optical coherence tomography. CT was measured at the fovea and at 1 mm and 3 mm nasal (N1 and N3),temporal (T1 and T3), superior (S1 and S3), and inferior (I1 and I3) from the fovea. Results: Mean foveal CTs were 346.86 μm, 301.97 μm, and 267.46 μm in the hyperopia, emmetropia, and myopiagroups, respectively (p < 0.05). CTs at N3 and T3 were 214.59 μm and 318.68 μm, 163.92 μm and 320.79μm, and 153.93 μm and 295.61 μm in the hyperopia, emmetropia, and myopia groups, respectively (p < 0.05). All CTs in the hyperopia group were thicker than those of other groups (p < 0.05). Fovea was thickest andwas significantly thicker than at N3 and I3 in hyperopia (p < 0.05). T3 thickness in the emmetropia and myopiagroups was greater than thickness at other areas, particularly the nasal and inferior choroids (p < 0.05). CTwas positively correlated with spherical equivalent (p = 0.029). Conclusions: In Korean children, CTs were greater in the hyperopia group than in the emmetropia and myopiagroups. The temporal choroid was thicker than the nasal choroid, regardless of the refractive error. The thickestlocation in the hyperopia group was the fovea; however, the temporal choroid was thickest in the emmetropiaand myopia groups.
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