Fig. 4: Two types of subretinal hyperreflective material (SHRM) as seen on optical coherence tomography.

Undefined SHRM (A) is described as a region of with low reflectivity with less well defined borders and therefore not easily distinguishable from surrounding neural components [43, 59]. Well-defined SHRM (B) is described as a region of high reflectivity in which boundaries are clearly delineated from the surrounding neural components of the retina [43, 59].