Photopic ERG properties (SD)
| Stimulus | Property | Control (n = 19) | NYX gene mutations ( n = 11) | CACNA1F gene mutations (n = 4) |
|---|---|---|---|---|
| SF | Mean a-wave latency (ms) | 13 (6) | 16 (1) | 16 (1) |
| Response prolonged in | 0 | 11 (100%) | 3 (75%) | |
| Mean a-wave amplitude (μV) | −62 (15) | −66 (18) | −38 (20) | |
| Response subnormal in | 0 | 0 | 2 (50%) | |
| Mean b-wave amplitude (μV) | 129 (41) | 100 (30) | 46 (15) | |
| Response abnormal in | 0 | 0 | 2 (50%) | |
| 30 Hz flicker | Mean latency (ms) | 11 (2) | 15 (5) | 15 (3) |
| Response prolonged in | 0 | 8 (73%) | 1 of 2 recordable (50%) | |
| Mean amplitude (μV) | 96 (28) | 84 (23) | 25 (13) | |
| Response subnormal in | 0 | 0 | 2 of 2 recordable (100%) | |
| ON-OFF response | Control (n = 15) | CSNB1 (n = 2) | CSNB2 (n = 2) | |
| Mean a-wave latency (ms) | 22 (1) | 28 (5) | 31 (2) | |
| Response prolonged in | 0 | 2 (100%) | 2 (100%) | |
| Mean a-wave amplitude (μV) | −36 (8) | −32 (0) | −17 (7) | |
| Response subnormal in | 0 | 0 | 1 (50%) | |
| Mean b-wave amplitude (μV) | 67 (14) | 19 (9) | 18 (2) | |
| Response subnormal in | 0 | 2 (100%) | 2 (100%) | |
| Mean d-wave amplitude (μV) | 49 (16) | 52 (24) | 16 (1) | |
| Response subnormal in | 0 | 0 | 2 (100%) | |