Table 1.
ERG results and differences of two DTL electrode positions
| Lower lid | Fornix | P value | |||
|---|---|---|---|---|---|
| Median | [IQR] | Median | [IQR] | ||
| a-wave amplitude* | |||||
| 0.3 | − 11.8 | [-15.5, − 8.1] | − 10.1 | [− 13.0, − 7.4] | < 0.001*** |
| 1.0 | − 19.4 | [− 25.1, − 14.3] | − 16.3 | [− 20.1, − 11.9] | < 0.001*** |
| 3.0 | − 29.7 | [− 37.8, − 22.2] | − 24.9 | [− 30.5, − 19.8] | < 0.001*** |
| 10.0 | − 46.1 | [− 57.2, − 35.4] | − 37.4 | [− 45.9, − 31.4] | < 0.001*** |
| a-wave implicit time* | |||||
| 0.3 | 19.0 | [18.2, 20.0] | 18.9 | [18.0, 20.1] | 0.445 |
| 1.0 | 17.1 | [16.4, 18.0] | 17.1 | [16.3, 17.8] | 0.115 |
| 3.0 | 15.7 | [15.1, 16.4] | 15.8 | [15.1, 16.5] | 0.816 |
| 10.0 | 14.8 | [14.3, 15.5] | 14.8 | [14.2, 15.5] | 0.119 |
| b-wave amplitude* | |||||
| 0.3 | 33.3 | [23.3, 42.0] | 26.2 | [20.4, 34.6] | < 0.001*** |
| 1.0 | 76.0 | [55.5, 97.6] | 63.1 | [49.9, 82.4] | < 0.001*** |
| 3.0 | 119.8 | [92.2, 151.7] | 103.2 | [81.7, 129.1] | < 0.001*** |
| 10.0 | 118.4 | [93.0, 144.6] | 105.0 | [82.6, 122.8] | < 0.001*** |
| b-wave implicit time* | |||||
| 0.3 | 27.0 | [25.8, 30.0] | 27.2 | [25.6, 29.9] | 0.718 |
| 1.0 | 28.9 | [27.8, 31.0] | 28.8 | [27.7, 30.8] | 0.105 |
| 3.0 | 31.6 | [30.7, 33.0] | 31.6 | [30.7, 33.0] | 0.129 |
| 10.0 | 35.9 | [34.8, 37.3] | 36.0 | [34.7, 37.2] | 0.055 |
| 30 Hz flicker peak | |||||
| Amplitude | 67.1 | [47.2, 86.3] | 58.0 | [43.9, 74.7] | < 0.001*** |
| Implicit time | 29.1 | [27.5, 31.3] | 29.1 | [27.6, 31.3] | 0.461 |
Descriptive statistics of the ERG responses of the two DTL positions (LLP and FP)
*Results of different flash strengths in candela. seconds/meters squared of the light-adapted ERG
***Statistically significant
ERG Electroretinogram, DTL Dawson, Trick, and Litzkow electrode, IQR interquartile range, LLP lower lid position, FP fornix position