• Four hundred eyes with moderate or severe proliferative diabetic retinopathy, initial good vision, and an average follow-up of 44.3 months were studied. Final visual acuity was 20/40 or better in 33% of these eyes, 20/50 to 5/200 in 32%, and 5/200 or worse in 35%. A poor visual prognosis was correlated with a traction detachment or relatively poor visual aculty at initial examination. No correlation was found between the length of follow-up and final visual prognosis. General guidelines are available for the management of these patients' conditions.
Spencer R, McMeel JW, Franks EP. Visual Outcome in Moderate and Severe Proliferative Diabetic Retinopathy. Arch Ophthalmol. 1981;99(9):1551-1554. doi:10.1001/archopht.1981.03930020425002