The
vitreous membrane (or
hyaloid membrane or
vitreous cortex) is a layer of
collagen separating the
vitreous humour from the rest of the
eye. At least two parts have been identified anatomically. The
posterior hyaloid membrane separates the rear of the vitreous from the
retina The
anterior hyaloid membrane separates the front of the vitreous from the
lens. Bernal et al. describe it "as a delicate structure in the form of a thin layer that runs from the
pars plana to the posterior lens, where it shares its attachment with the posterior zonule via Wieger’s ligament, also known as Egger’s line".