Table 5.
Retinal Capillary Obliteration on Angiography within 4 Months from Onset
| Location | Grade | ||||
|---|---|---|---|---|---|
| None | Patchy or Small | Moderate | Extensive | Not able to grade* | |
| Non-ischemic CRVO (n=447) | |||||
| Fovea (center) | 417 (93%) | 4 (0.9%) | 6 (1%) | 0 (0%) | 20 (4%) |
| Perifovea | 420 (94%) | 2 (0.5%) | 5 (1%) | 0 (0%) | 20 (4%) |
| Macular | 420 (94%) | 3 (0.7%) | 4 (0.9%) | 0 (0%) | 20 (4%) |
| Post. Pole | 417 (94%) | 5 (1%) | 4 (0.9%) | 0 (0%) | 20 (4%) |
| Peripheral | 443 (91%) | 0 (0%) | 6 (1%) | 1 (0.2%) | 33 (7%) |
| Ischemic CRVO at first diagnosis (n=72) | |||||
| Fovea (center) | 8 (11%) | 4 (6%) | 3 (4%) | 15 (21%) | 42 (58%) |
| Perifovea | 8 (11%) | 4 (6%) | 6 (8%) | 12 (17%) | 42 (58%) |
| Macular | 9 (12%) | 4 (6%) | 5 (7%) | 12 (17%) | 42 (58%) |
| Post. Pole | 5 (7%) | 3 (4%) | 6 (8%) | 16 (22%) | 42 (58%) |
| Peripheral | 6 (8%) | 0 (0%) | 2 (3%) | 18 (25%) | 46 (64%) |
| Ischemic CRVO converted from non-ischemic CRVO (n=23) | |||||
| Fovea (center) | 3 (13%) | 1 (4%) | 0 (0%) | 8 (35%) | 11 (48%) |
| Perifovea | 2 (9%) | 2 (9%) | 2 (9%) | 6 (26%) | 11 (48%) |
| Macular | 1 (4%) | 5 (22%) | 5 (22%) | 2 (9%) | 10 (43%) |
| Post. Pole | 2 (9%) | 4 (17%) | 4 (17%) | 4 (17%) | 9 (39%) |
| Peripheral | 2 (9%) | 1 (5%) | 3 (13%) | 6 (26%) | 11 (48%) |
*
Not able to grade severity of capillary obliteration because of overlying extensive retinal hemorrhages