Assessment of choroidal vascularity index in healthy eyes of different subfoveal choroidal areas on enhanced depth imaging optical coherence tomography

VernacularTitle:频域光相干断层扫描不同测量范围对正常健康眼脉络膜血管指数的影响
Author: Qihan GUO ¹ ; Shuang LI ; Kang WANG
Author Information

1. 首都医科大学临床医学院，北京　100069
From: Chinese Journal of Ocular Fundus Diseases 2020;36(5):366-369
CountryChina
Language:Chinese
Abstract: Objective:To observe the effect of spectral-domain OCT with different subfoveal choroidal areas on choroid vascular index (CVI) in normal healthy eyes.Methods:Retrospective clinical study. From October 2017 to May 2018, 174 eyes of 87 healthy people who visited in the Ophthalmology Department of Beijing Friendship Hospital and had no eye abnormalities were included in the study. All patients received single line scan of macular fovea by enhanced depth imaging OCT. After binary processing of the collected choroidal images, CVI as the center radius of 750, 1500, 3000 and 4500 μm were calculated. Repeated measurement analysis of variance was performed for comparison of CVI between groups.Results:The mean values of CVI in the 750, 1500, 3000 and 4500 μm groups were 0.681±0.003, 0.678±0.002, 0.677±0.002 and 0.676±0.002, respectively. The difference between the 750 μm group and the 4500 μm group was 0.005±0.002 ( P=0.009). The other pairwise comparison results showed no statistically significant difference ( P>0.05). Conclusion:The CVI is different in healthy eyes with the different distance from macular fovea.