Table 2. Post-operative Changes in Retinal Layer Thickness.
| Pre | Post | Friedman test | Scheffe's paired comparison (P value) | |||||
|---|---|---|---|---|---|---|---|---|
| 1M | 3M | 6M | (P value) | 1M | 3M | 6M | ||
| Whole layer | 327.8 ± 25.8 | 322.1 ± 11.8 | 316.7 ± 11.5 | 312.1 ± 16.3*** | <0.001 | 0.99 | 0.46 | 0.0001 |
| Inner layer | ||||||||
| 8 sectors | 108.6 ± 13.2 | 102.4 ± 8.0 | 98.4 ± 8.4** | 98.7 ± 9.5* | <0.001 | 0.92 | 0.001 | 0.02 |
| ILM-NFL | 32.8 ± 7.4 | 33.5 ± 4.2 | 31.2 ± 4.7 | 31.5 ± 5.4 | 0.12 | 0.21 | 0.99 | 0.98 |
| GCL-IPL | 75.7 ± 7.7 | 68.3 ± 8.0** | 67.1 ± 8.6*** | 67.2 ± 8.9** | <0.001 | 0.006 | <0.001 | 0.002 |
| Parafovea (4 sectors) | 119.3 ± 19.8 | 107.4 ± 9.0 | 102.7 ± 9.7*** | 103.7 ± 10.6** | <0.001 | 0.25 | <0.001 | 0.01 |
| Perifovea (4 sectors) | 98.1 ± 9.7 | 97.4 ± 9.1 | 94.1 ± 9.8 | 93.7 ± 11.1 | 0.003 | 0.92 | 0.15 | 0.15 |
| Outer layer | 128.8 ± 6.9 | 137.6 ± 6.4*** | 138.2 ± 6.4*** | 136.7 ± 6.0** | <0.001 | <0.001 | <0.001 | 0.002 |
| PROS length | ||||||||
| Fovea | ND | 17.3 ± 16.2 | 31.8 ± 11.2* | 36.6 ± 10.2*** | <0.001 | ND | 0.01 | <0.001 |
| Nasal | 26.5 ± 3.9 | 29.6 ± 4.4 | 33.9 ± 4.3*** | 33.4 ± 2.9*** | <0.001 | 0.27 | <0.001 | <0.001 |
| Temporal | 27.6 ± 3.9 | 30.1 ± 5.0 | 32.3 ± 4.9*** | 32.6 ± 3.8*** | <0.001 | 0.18 | <0.001 | <0.001 |
| Superior | 26.1 ± 4.6 | 30.5 ± 4.6 | 34.0 ± 4.0*** | 33.5 ± 3.8*** | <0.001 | 0.11 | <0.001 | <0.001 |
| Inferior | 23.6 ± 4.7 | 28.6 ± 4.8* | 31.2 ± 4.0*** | 32.9 ± 2.7*** | <0.001 | 0.02 | <0.001 | <0.001 |
ILM = internal limiting membrane; NFL = nerve fiber layer; GCL = ganglion cell layer; IPL = inner plexiform layer; PROS = photoreceptor outer segment; ND = not done;
*P<0.05,
**P<0.01,
***P<0.001.