Fig. 6 A. Artist's drawing of the three stages of progressive bifocal chorioretinal atrophy: Stage 1 (left), Stage 2 (center), and Stage 3 (right). B. Right eye of 17-year-old patient with late Stage 2, early Stage 3 disease. Visual acuity was 20/200. C. Right eye of older patient with Stage 3 disease. (From Douglas AA, Waheed I, Wyse CT: Progressive bifocal chorio-retinal atrophy: A rare familial disease of the eyes. Br J Ophthalmol 52:742, 1968)