Can there be smoke without fire? Optical coherence tomography angiography has the answer

Macular edema is typically seen on optical coherence tomography (OCT) as fluid-filled cystic alterations that cause increased retinal thickness. The increased OCT reflectivity within these intraretinal spaces in the outer avascular retina can exhibit flow-like properties when imaged using OCT angiography (OCTA). The motion signal arising from within these intraretinal cavities corresponds to a feature of exudation known as suspended scattering particles in motion (SSPiM). We present multimodal imaging of a patient with SSPiM who underwent partial resolution of this OCTA finding.