Visual outcomes of idiopathic choroidal neovascularisation (CNV) according to its location and the choroidal watershed zone
| Visual acuity average (range) in logMAR* | |||
|---|---|---|---|
| Baseline (N=36) | 6 months (N=36) | 1 year (N=19) | |
| Hayashi's classification | |||
| Type II-A | 0.56 (0.0–2.0) | 0.08 (0.0–0.4) | 0.05 (0.0–0.1) |
| Type II-B | 0.13 (0.0–0.3) | 0.07 (0.0–0.2) | 0.03 (0.0–0.1) |
| Type III | 0.41 (0.0–1.4) | 0.10 (0.0–0.4) | 0.14 (0.0–0.4) |
| Type IV | 0.53 (0.0–2.0) | 0.30* (0.0–1.7) | 0.38 (0.0–1.7) |
| Mendrinos’ classification | |||
| Stellate | 0.53 (0.0–2.0) | 0.30* (0.0–1.7) | 0.63 (0.0–1.7) |
| Vertical | 0.39 (0.0–2.0) | 0.09 (0.0–0.4) | 0.09 (0.0–0.4) |
| Without extending to the fovea | 0.56 (0.0–2.0) | 0.08 (0.0–0.4) | 0.05 (0.0–0.1) |
| Extending to the fovea | 0.18 (0.0–0.5) | 0.07 (0.0–0.4) | 0.06 (0.0–0.2) |
| Through the fovea | 1.40 (NA‡) | 0.40 (NA) | 0.40 (NA) |
| Angled | 0.70 (NA) | 0.00 (NA) | NA (NA) |
| CNV§ location | |||
| Subfoveal | 0.57 (0.0–2.0) | 0.36* (0.0–1.7) | 0.44 (0.0–1.7) |
| Juxtafoveal | 0.58 (0.2–1.4) | 0.11 (0.0–0.4) | 0.17 (0.0–0.4) |
| Extrafoveal | 0.30 (0.0–1.4) | 0.08 (0.0–0.6) | 0.03 (0.0–0.2) |
*p<0.05, Mann-Whitney U test, compared with the other groups.
CNV, choroidal neovascularisation; logMAR, logarithm of minimum angle of resolution; NA, not applicable.