1. Exploring the association of collaterals and vessel density using optical coherence tomography angiography in retinal vein occlusions

    Exploring the association of collaterals and vessel density using optical coherence tomography angiography in retinal vein occlusions

    Purpose: Using optical coherence tomography angiography (OCTA) to characterize the types of collaterals in eyes with retinal vein occlusion (RVO) and further investigate their correlations with vessel densities of the superficial (SCP) and the deep capillary plexus (DCP). Methods: This cross-sectional study included 25 eyes of 23 patients with RVO. 3 x 3 mm2 OCTA macular scans were used to quantify the parafoveal vessel density (VD) of the SCP and DCP, and to classify the collaterals into one of four types (true superficial, true deep, superficial diving, and foveal collateral). Poisson regression model was used to identify significant associations between ...

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