Fig. 14 In cases with an obvious edge, the tip of the bent 20-gauge microvitreoretinal blade or 23-gauge needle engages the membrane and gently peels it from the retinal surface. (Margherio RR: Epiretinal macular membranes. In Albert R, Jakobiec EA, eds. Principles and Practice of Ophthalmology, Vol. 2. Philadelphia: WB Saunders, 1993:919–925)