Optical Coherence Tomography Angiography Findings in Diffuse Unilateral Subacute Neuroretinitis

BACKGROUND AND OBJECTIVE: To report a unique case series of diffuse unilateral subacute neuroretinitis (DUSN) patients imaged with optical coherence tomography angiography (OCTA). PATIENTS AND METHODS: In this retrospective case series, multimodal imaging was performed in four patients with DUSN at the time of patient visit. The study patients underwent standard clinical treatment for DUSN. RESULTS: The clinical findings were consistent with the diagnosis of DUSN. Cross-sectional OCT showed disruption of outer retinal layers in the foveal area and an irregular structure of the outer plexiform layer. En face OCT revealed hyperreflective spots and a large hyperreflective lesion in the foveal area correspondent to the outer retina disruption seen on cross-sectional OCT. OCTA demonstrated decreased vascular perfusion in both the superficial and deep retinal capillary plexuses along with choriocapillaris preservation. CONCLUSION: OCTA may provide a more detailed assessment of the retinal microvascular changes, allowing a more precise anatomical-functional correlation in DUSN.