Table 3. Full-Field Electroretinographic Recordings in the Right and Left Eyes of the Preterm and Control Groups.
| ERG Protocol | Mean (SD) [range] | |||
|---|---|---|---|---|
| Preterm Group (n = 52) |
Control Group (n = 45) |
|||
| Right Eye | Left Eye | Right Eye | Left Eye | |
| Dark-adapted 0.009 ERG | ||||
| b-Wave, μV | 291.0 (108.2) [38.5 to 561.9] |
271.6 (121.5) [65.8 to 666.2] |
333.0 (124.7) [129.3 to 693.6] |
317.3 (111.5) [134.8 to 579.7] |
| b-Wave, ms | 93.1 (12.8) [71.0 to 130.0] |
94.5 (14.1) [74.5 to 160.0] |
93.0 (12.6) [63.5 to 127.5] |
94.3 (16.1) [71.0 to 139.0] |
| Dark-adapted 0.17 ERG | ||||
| a-Wave, μV | −94.4 (50.6) [−226.7 to −15.8] |
−78.5 (43.9) [−197.1 to −1.6] |
−96.2 (47.8) [−207.4 to −3.4] |
−98.3 (44.6) [−187.4 to −25.7] |
| a-Wave, ms | 25.3 (2.6) [13.0 to 30.5] |
25.2 (2.9) [17.0 to 30.5] |
25.3 (2.2) [17.5 to 30.5] |
25.3 (1.3) [19.0 to 27.5] |
| b-Wave, μV | 365.0 (116.7) [133.4 to 656.6] |
351.1 (108) [131.9 to 577.3] |
410.5 (111.5) [162.1 to 663.3] |
382.5 (111.7) [163.3 to 625.1] |
| b-Wave, ms | 71.5 (12.6) [43.5 to 85.0] |
73.1 (11.9) [44.0 to 85.0] |
69.9 (13.2) [43.5 to 85.0] |
69.9 (12.7) [43.0 to 85.0] |
| Dark-adapted 3 ERG | ||||
| a-Wave, μV | −220.2 (78.0) [−395.9 to −81.9] |
−201.8 (81.4) [−443.0 to 32.9] |
−256.9 (86.6) [−453.5 to −114.5] |
−263.7 (81.5) [−423.3 to −113.7] |
| a-Wave, ms | 15.3 (2.1) [12.5 to 28.0] |
15.2 (0.8) [11.0 to 16.5] |
15.0 (0.4) [14.0 to 16.0] |
15.0 (0.5) [13.5 to 16.0] |
| b-Wave, μV | 450.5 (130.1) [180.8 to 796.4] |
431.4 (118.1) [234.6 to 669.9] |
484.2 (128.2) [174.8 to 772.6] |
457.5 (120.5) [217.6 to 736.5] |
| b-Wave, ms | 52.6 (4.7) [44.5 to 60.0] |
53.1 (4.6) [44.0 to 60.0] |
53.1 (5.3) [43.5 to 60.0] |
53.3 (5.3) [43.5 to 60.0] |
| Dark-adapted 12 ERG | ||||
| a-Wave, μV | −252.5 (93.0) [−482.9 to −51.6] |
−232.2 (70.9) [−380.3 to −90.3] |
−300.8 (106.2) [−527.3 to −103.9] |
−295.4 (106.3) [−522.5 to −90.9] |
| a-Wave, ms | 13.6 (2.4) [10.5 to 27.0] |
13.8 (2.9) [10.0 to 25.5] |
12.6 (1.8) [10.0 to 19.0] |
12.5 (1.4) [10.0 to 19.5] |
| b-Wave, μV | 441.1 (135.2) [208.8 to 691.0] |
421.2 (110.5) [234.2 to 657.5] |
495.7 (156.0) [236.1 to 905.6] |
458.6 (143.0) [185.4 to 784.3] |
| b-Wave, ms | 49.8 (3.9) [40.0 to 55.0] |
50.3 (4.2) [40.5 to 55.0] |
49.7 (5.0) [39.5 to 55.0] |
50.2 (4.9) [38.5 to 55.0] |
| 30-Hz flicker ERG | ||||
| b-Wave, μV | 78.6 (30.4) [26.9 to 164.4] |
67.3 (22.5) [17.4 to 122.5] |
85.8 (23.2) [32.1 to 164.3] |
80.6 (22.1) [33.9 to 119.1] |
| b-Wave, ms | 28.3 (1.6) [25.5 to 32.0] |
28.6 (2.0) [24.0 to 32.0] |
27.5 (1.4) [25.0 to 31.0] |
27.3 (1.2) [25.0 to 30.5] |
| 3 Single-cone flash ERG | ||||
| b-Wave, μV | 111.2 (42.4) [34.9 to 228.1] |
106.2 (38.4) [36.9 to 193.2] |
126.7 (36.8) [43.3 to 221.0] |
122.1 (37.8) [48.8 to 212.0] |
| b-Wave, ms | 30.5 (1.3) [28.0 to 35.0] |
29.9 (1.5) [25.0 to 33.0] |
30.0 (1.1) [27.0 to 32.5] |
29.9 (1.0) [27.0 to 32.0] |
Abbreviation: ERG, electroretinography.