Mean values (SD) of contrast sensitivity, assessed at five spatial frequencies, in the better eyes in prematurely born and full term children
| Better eye | 1.5 cycles/deg | 3 cycles/deg | 6 cycles/deg | 12 cycles/deg | 18 cycles/deg | |
|---|---|---|---|---|---|---|
| Significant differences between controls and prematures at 1.5 cycles/deg (p = 0.03), 3 cycles/deg (p<0.001), 6 cycles/deg (p<0.001), 12 cycles/deg (p<0.001) and 18 cycles/deg (p<0.001). | ||||||
| Controls (n = 215) | 1.73 (0.18) | 2.11 (0.16) | 2.13 (0.17) | 1.92 (0.19) | 1.49 (0.23) | |
| Prematures (n = 205) | 1.68 (0.17) | 2.02 (0.19) | 2.03 (0.24) | 1.80 (0.30) | 1.30 (0.34) | |
| No ROP (n = 133) | 1.70 (0.17) | 2.03 (0.19) | 2.07 (0.19) | 1.85 (0.24) | 1.37 (0.27) | |
| Mild ROP (n = 38) | 1.67 (0.16) | 2.01 (0.19) | 2.01 (0.20) | 1.78 (0.32) | 1.26 (0.40) | |
| Severe ROP, untreated (n = 12) | 1.64 (0.15) | 1.98 (0.17) | 1.99 (0.18) | 1.77 (0.24) | 1.24 (0.23) | |
| Cryotreated ROP (n = 22) | 1.63 (0.18) | 1.98 (0.25) | 1.86 (0.42) | 1.58 (0.50) | 0.96 (0.44) | |