Dominant slowly progressive macular dystrophy.

Twenty-three members of one white family were studied for a new form of dominant slowly progressive macular dystrophy in which visual acuity remained good until the seventh decade. Ten patients had positive signs of this entity. Eight patients had possible early forms. Five had no signs. Several patients had visual acuity fluctuations, documented by their ophthalmologists who saw associated pigment epithelial alterations in some cases. Obvious macular changes included perifoveal pigment epithelial atrophy, posterior pole flecks, and fundus lesions resembling an atrophic form of senile macular degeneration. We suggest a possible hereditary predisposition to senile macular degeneration in our patients.