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PURPOSE: To investigate the choroidal and retinal thickness in myopic, emmetropic, and hyperopic Chinese children by swept-source longer-wavelength optical coherence tomography. DESIGN: Cross-sectional study. METHODS: Two-hundred and seventy-six schoolchildren aged 7-13 years underwent comprehensive ophthalmic examinations, including cycloplegic refraction, and swept-source optical coherence tomography measurements. The thickness of the choroid, retina, ganglion cell layer, and nerve fiber layer were compared among children of different refractive status. The topographic variation and factors related to the thickness of the choroid and retinal layers were analyzed. RESULTS: Compared to emmetropic subjects, those with myopia had a significantly thinner choroid in all regions (P .05). The axial length and refractive diopters were independently related to central foveal choroidal thickness (R(2) = 0.17, P .05). CONCLUSIONS: Choroidal thickness, but not retinal thickness, correlated closely with axial length and refractive diopters in Chinese children. Choroid thinning occurs before retina thinning early in myopic progression.
Jin et al. (Sat,) studied this question.
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