Understanding the vitreous Anatomy, ageing and transformation

increased vitreoretinal adhesion include lattice degeneration, some post-inflammatory lesions, areas of degenerative modelling, and some vitreous base lesions. These areas of increased adhesion may remain attached, even if the vitreous is detached elsewhere. Sebag and Balazs reported that the posterior vitreous cortex contained a round hole corresponding to the peripapillary attachment. The diameter of the hole measures approximately 1.25mm. A second hole, corresponding to a premacular attachment, was reported to measure approximately 5mm in diameter. This latter hole has not been uniformly reported in subsequent literature. Clinically, the posterior vitreous cortex is best visualised after a posterior vitreous detachment (PVD) when it has separated from the retina. Weiss ring describes the clinically visible hole in the detached vitreous cortex, corresponding to the former circumscribed area of peripapillary attachment (Figure 1).