Author: Sumit Randhir Singh (India)
Co-authors: Oliver Beale, Enrico Peiretti, Kiran Kumar Vupparaboina, Filippo Tatti, Claudio Iovino, Jay Chhablani
To correlate sectoral choroidal vascularity with angiographic leakage in eyes with central serous chorioretinopathy (CSCR).
The current study was a multicentric, retrospective, cross-sectional study and included eyes with active CSCR. This was defined as subretinal fluid (SRF) on optical coherence tomography (OCT) and/or leakage on fundus fluorescein angiography (FFA).
Multimodal imaging including fundus fluorescein angiography (FFA) and optical coherence tomography (OCT) were performed to identify leakage site and obtain choroidal measurements, respectively. An automated algorithm was used to perform shadow compensation, choroidal boundary localization and binarization, three (3-D) dimensional mapping, and early treatment of diabetic retinopathy study (ETDRS) grid based choroidal quantification i.e., choroidal thickness (CT) and choroidal vascularity index (CVI). Nested analysis of variance (ANOVA) was performed to compare CT and CVI in different sectors.
Thirty-two eyes with active CSCR were analyzed. CT values varied significantly among the sectors (range, 450.27 to 482.63µm; p=0.005) and rings (range, 459.71 to 480.45µm; p <0.001), however, CVI failed to show significant variation among various segments (sectors, rings, and quadrants; range, 0.53-0.54; all p values >0.05). Among 25 leaking spots in 25 different sectors, 12 (48%) had an increased CT compared to the overall CT whereas only 24% had increased CVI compared to overall CVI. Mean CT and CVI of the sectors with leakage (427.1±81.1µm; 0.51±0.05) and remaining sectors without leakage (411.3±73.9µm; 0.53±0.04) were not statistically different (p=0.48; p=0.12 respectively).
Though CT varied in different segments and increased CT corresponded to leakage points on FFA in 48% of eyes, CVI changes were more diffusely spread and local changes in CVI were not predictive of leakage location in eyes with active CSCR.