ABSTRACT This report describes several methods of degrading imagery through the central portion of a spectacle lens to provide a cosmetically acceptable means of obtaining single vision in the central field of patients with intractable diplopia. For 2 strabismic patients with annoying diplopia, we applied to 1 spectacle lens a centrally placed disc (about 1 inch diameter) consisting of (1) translucent tap, a (2) a +7 D Fresnel lens, b or (3) stippled, clear lacquer. For 1 patient, the lacquer was the most acceptable; for the other, the tape was best. We present here the case reports for these 2 patients, showing why they preferred different image‐degrading methods and how these and other methods of central‐field image degrading can be advantageous even when diplopia is present across most of the visual field.
Kirschen et al. (Sun,) studied this question.