Dominant optic atrophy. The clinical profile

L. B. Kline and J. S. Glaser

We examined 24 individuals in four family pedigrees with dominantly inherited optic atrophy (DOA); 12 patients met the criteria for diagnosis of DOA and two were suspect. Our data indicate that (1) insidious onset usually occurred in childhood, but subjective visual symptoms may evolve in adulthood; (2) visual function was minimally (20/25) to moderately (20/400) abnormal, could be strikingly asymmetric in an individual (eg, 20/30 in the right eye and 20/200 in the left eye), and showed considerable intrafamilial and interfamilial variation; (3) visual field defects consisted of central and centrocecal scotomas, but no peripheral isopter abnormalities were found; (4) color-vision screening with Hardy-Rand-Rittler plates revealed dyschromotopsias, but only Farnsworth-Munsell 100-hue examination disclosed the typical tritan defects; (5) pattern-reversal visual-evoked responses were characterized by diminished amplitudes and prolonged latencies, consistent with neural conduction defects; (6) disc pallor was limited to the temporal segment in all cases, and 16 of 24 eyes showed focal temporal excavation, which is probably pathognomonic of DOA.

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