III.H. Peripheral Vitreo–Retinal Pathologies

摘要: Vitreous occupies about four-fifths of the volume eye and weighs approximately 4 g. The vitreous body is somewhat spherical with slight flattening meridionally has a cup-shaped depression anteriorly, known as patellar fossa. attached to all contiguous structures, but firmness attachment varies topography age [1–3]. It most firmly at base, 3-dimensional doughnutlike structure that 3–6 mm wide straddles ora serrata. base includes posterior 2 pars plana from 1 anterior retina border located farther posteriorly in older individuals [4] more nasally than temporally [5], which may underlie greater frequency retinal tears elsewhere peripheral [4]. density collagen greatest within fibers are oriented perpendicular plane, whereas orientation tangential this plane. contains remnants fetal hyaloid vasculature, it been suggested antigens region [6] or degenerative products [7] be immunogenic play role ocular inflammatory diseases, such planitis.