Clinically speaking, distinguishing between preretinal and subhyaloid hemorrhages is difficult. Therefore, clinicians use the terms inter-changeably. A D-shaped or boat-shaped appearance may be observed, because the blood accumulates within loosely adherent tissue of the superficial retina and can spread and settle inferiorly with gravity. A sharp demarcation line is usually evident.

HPO:probinson

2016-12-17T00:34:43Z

A localized detachment of the vitreous from the retina due to the accumulation of blood. When localized in the macular area, it results in sudden profound loss of vision. Subhyaloid premacular hemorrhage is typically characterized by a circumscribed, round or dumb-bell shaped, bright red mound of blood beneath the internal limiting membrane (ILM) or between the ILM and hyaloid face, in or near to the central macular area.

Subhyaloid haemorrhage, Subhyaloid heme