Evaluation of Macular Circulation in Patient with Sudden Visual Loss Secondary to Behcet's Perifoveal Vasculitis by using (Retinal Flow) Swept-Source Optical Coherence Tomography Angiography Map

Objective: To evaluate macular vascular circulation in patient with perifoveal vasculitis secondary to Behcet’sdisease by using (Retinal Flow) swept source optical coherence tomography angiography map.Case report: We retrospectively review a 39-year-old female patient, with history of Behcet’s disease, presented with history of sudden unexplained central loss of vision which was more significant on the right eye with best corrected vision (BCVA=0.1) and less on the left eye with best corrected visual acuity (BCVA=0.7). The clinical ophthalmic examination of both anterior and posterior segments for the both eyes were normal with no any signs of uveitis. Imaging with DRI Triton Swept Source (SS- OCTA) (Topcon, Japan) was performed for evaluation of both superficial and deep capillary plexus of macular area. Fluorescein angiography (FA) was used also for assessing foveal avascular zone features.Results: The SS-OCTA Retinal Flow map was more sensitive than FA in marking out hypoperfusion in both superficial capillary plexus (SCP), and deep capillary plexus (DCP), especially in the right eye which had the positive correlation with visual acuity. SS-OCTA Retinal Flow map was also sensitive in showing improvement of macular hypoperfusion after treatment of Behcet’s Perifoveal Vasculitis.Conclusion: OCTA is a noninvasive imaging modality that can be used to evaluate macular vascular changes in Bechet’s perifoveal vasculitis and can explain acute visual loss in Behcet.