File:Evolution of PVD Stages.jpg

Evolution of normal posterior vitreous detachment (PVD) - Stage 1 consists of perifoveal vitreous detachment with persistence of vitreous attachment to the fovea, mid-peripheral retina and the optic disc. Stage 2 consists of vitreofoveal detachment with persistence of vitreous attachment to the mid-peripheral retina and the optic disc. Stage 3 consists of vitreous detachment from mid-peripheral retina with persistent attachment to the optic disc. Stage 4 or complete PVD consists of detachment of the vitreous from the optic disc. Stage 1 of PVD can present as vitreomacular adhesion (VMA) or vitreomacular traction (VMT). Stages 2 and 3 of PVD can present as vitreopapillary adhsion (VPA) or vitreopapillary traction (VPT). The evolution of PVD may deviate from this typical pattern. (Adapted from description by Johnson [9])