Age (years) | Fundus abnormalities | ERG | VEP | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
none | mild | severe | normal | cone | cone rod | normal | abnormal | ||||
<15 | 4/13 (31%) | 9/13 (69%) | 0 | 3/9 (33%) | 4/9 (44%) | 2/9 (22%) | 6/13 (46%) | 7/13 (54%) | |||
15–30 | 1/5 (20%) | 2/5 (40%) | 2/5 (40%) | 1/5 (20%) | 1/5 (20%) | 3/5 (60%) | 2/6 (33%) | 4/6 (67%) | |||
>30 | 0 | 2/5 (40%) | 3/5 (60%) | 0/4 (0%) | 3/4 (75%) | 1/4 (25%) | 1/5 (20%) | 4/5 (80%) |