Comparing SS-OCT-A and FA in Detection of Choroidal Perfusion Defects in GCA

Peripapillary choroidal filling delay demonstrated by dye-based angiography is well recognized as a non-specific but suggestive finding of giant cell arteritis (GCA). Optical coherence tomographic angiography (OCT-A) has been studied as a non-invasive alternative for vasculature imaging in GCA. We previously reported cases in which spectral domain OCT-A was unable to detect the choroidal nonperfusion seen on fluorescein angiography (FA). Herein, we aimed to determine whether swept source OCT-A (SS-OCT-A) , with improved resolution of deeper retinal and choroidal vessels, is capable of demonstrating choroidal perfusion abnormalities.