Fig. 3 Large syneretic cavity simulating a complete posterior vitreous separation but with thin layer of posterior hyaloid still attached to posterior pole (arrow). (Margherio RR: Epiretinal macular membranes. In Albert R, Jakobiec EA, eds. Principles and Practice of Ophthalmology, Vol 2. Philadelphia: WB Saunders, 1993. Copyright 1990:919–925, S.W. Cochran)