New Insights On Ocular Sarcoidosis: An Optical Coherence Tomography Angiography Study.

Purpose : To report optical coherence tomography angiography (OCT-A) findings in eyes with ocular sarcoidosis (OS) and to compare these findings with those of fluorescein angiography (FA). Methods : Observational, cross-sectional, case-control study. Patients presenting with OS involving the posterior segment were evaluated using FA, structural-OCT and OCT-A. OCT-angiograms of the superficial (SCP) and deep (DCP) capillary plexuses and choriocapillaris (CC) were qualitatively and quantitatively analyzed. Results : OCT-A seemed more sensitive than FA in detecting perifoveal capillary arcade disruptions, areas of hypoperfusion/non-perfusion and capillary abnormalities ( p <0.05). Capillary hypoperfusion was more frequently detected in the DCP than in SCP, conversely capillary abnormalities were more often observed at the level of the SCP. Capillary vessel density values were significantly lower in eyes with OS than in healthy controls both at the level of DCP and CC (p< 0.05). Conclusion : The depth-resolved nature of OCT-A allowed new insights on OS-induced microvascular and perfusion impairments.