Rod thresholds in dominantly inherited juvenile optic atrophy.

Three members of a family with dominantly inherited juvenile optic atrophy with tritan type of colour vision deficiency all showed dysfunction of the rod mechanism tested with green light after 30 min of dark adaptation. Two subjects had typical optic atrophy, centrocaecal scotoma and lower than normal visual acuity. In 1 subject with good visual acuity of both eyes, no optic atrophy was observed, but there were, in this case, reduced peripheral parts of the standard visual fields.