Choroidal thickness in relation to diopter and axial length among myopic children

• Published in: Frontiers in medicine 2023-10, Vol.10, p.1241352-1241352
• Main Authors: Zhu, Huailin, Liu, Changyang, Gao, Mingjun, Zhang, Siqi, Zhang, Lan, Zhao, Qi
• Format: Article
• Language: English
• Subjects: axial length; choroidal thickness; Medicine; myopia; optical coherence tomography; spherical equivalent refraction
• ISSN: 2296-858X; 2296-858X
• DOI: 10.3389/fmed.2023.1241352

PurposeThe aim of this study was to analyze the relationship between diopter (D) and choroidal thickness in myopic children by describing the values of choroidal thickness, and explore choroidal thickness as an important indicator for evaluating the progression of myopia.MethodsThe study included myopic and emmetropic children aged 6-14 years (156 eyes) from the Second Hospital of Dalian Medical University. The participants were divided into four groups according to the spherical equivalent refraction (SER): low myopes, moderate myopes, high myopes, and emmetropes. Choroidal thickness was measured in nine areas using the Early Treatment Diabetic Retinopathy Study (ETDRS) grid layout, which divided the areas into concentric circles of 0 × 0 mm, 3 × 3 mm, and 5 × 5 mm from the Sub Fovea. The images were obtained manually with spectral-domain optical coherence tomography scanner.ResultsThere were significant differences of choroidal thickness in the nine areas of the ETDRS grid for all myopes. The distribution of choroidal thickness in low and moderate myopes were different from that in high myopes. In the horizontal direction, choroidal thickness decreased from the temporal to nasal areas for all myopes. In the vertical direction, the choroidal thickness in the perifovea was smaller than that in the parafovea (SER ≥ -2.75D), and the choroidal thickness in the perifovea was greater than that in the parafovea (SER