Table 2
Comparison of the a-wave's amplitude at 10, 11, and 12 ms between the normal and the glaucoma group
| Flash intensity (cd/s/m2) | Normal group a-wave's amplitude (μV) (mean and (SD)) | Glaucoma group a-wave's amplitude (μV) (mean and (SD)) | p Value | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Time at which the response magnitudes were measured (ms) | |||||||||||
| 10 | 11 | 12 | 10 | 11 | 12 | 10 | 11 | 12 | |||
| 9.4 | 299 (58) | 331 (61) | 352 (61) | 235 (87) | 255 (88) | 165 (67) | 0.006 | 0.005 | 0.004 | ||
| 5.3 | 238 (42) | 273 (47) | 302 (51) | 165 (67) | 191 (74) | 214 (79) | 0.004 | 0.004 | 0.004 | ||
| 1.7 | 79 (23) | 95 (27) | 112 (32) | 64 (28) | 78 (34) | 92 (40) | ns | ns | ns | ||
| 0.5 | 35 (12) | 44 (14) | 52 (17) | 26 (12) | 31 (14) | 37 (16) | ns | ns | ns | ||
| 0.2 | 23 (16) | 28 (18) | 34 (21) | 11 (6) | 14 (8) | 17 (9) | ns | ns | ns | ||
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Comparing the normal and the glaucoma group, the a-wave's amplitude showed a significant difference for flash intensities of 5.3 and 9.4 cd/s/m2, but not for lower luminances. The table shows the mean a-wave's amplitudes with standard deviations (SD) and the results of the unpaired t test for each flash intenity and for the three fixed times of 10, 11, and 12 ms at which the response magnitudes were measured.
