Fig. 5 A. An idiopathic epiretinal membrane in a 65-year-old man. Visual acuity was 20/25. B. Black-and-white fundus photograph taken with green 540-nm filter. Note increased definition of epiretinal membrane. (Margherio RR: Epiretinal macular membranes. In Albert R, Jakobidc EA, eds. Principles and Practice of Ophthalmology, Vol. 2. Philadelphia: WB Saunders, 1993:919–925)