Fig. 7. Posterior human vitreous structure. Posterior vitreous in the left eye of a 59-year-old man. The vitreous cortex envelops the vitreous body and multiple, small, very bright points, which are hyalocytes (see Figs. 8, 9), are seen to scatter light intensely. There are two areas in the posterior vitreous cortex through which vitreous extrudes into the retrohyaloid space. The prepapillary hole is smaller (to the left, see arrows at nasal edge) and has a small amount of extruding vitreous. Larger amounts of vitreous extrude by way of the premacular vitreous cortex and fibers course from the central vitreous into the retrohyaloid space. (From Sebag J: Age-related differences in the human vitreoretinal interface. Arch Ophthalmol 109:966, 1991.)