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Fig.2 | BMC Ophthalmology

Fig.2

From: Correlation between choroidal vascularity and retrobulbar ocular blood flow changes and thyroid-associated ophthalmopathy activity: a cross-sectional study

Fig.2

Measurement technique of choroidal vascularity index (CVI). A The enhanced depth optical coherence tomography(EDI-OCT) images of the subjects. B The binarisation image by Niblack auto local threshold method. C The total choroidal area(TCA) was determined using the region of interest (ROI) manager. D the color threshold tool was used to select the dark pixels, representing the luminal areas(LA).CVI was calculated by dividing LA to TCA

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BMC Ophthalmology

ISSN: 1471-2415

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