Table 3.
Choroidal thickness, vessel diameter, and ratio characteristics according to location in the fovea
| Locations | Normal subjects | Highly myopic subjects | |||||
|---|---|---|---|---|---|---|---|
| N | Mean | SD | N | Mean | SD | ||
| Mean CTh | Foveal | 39 | 242.8 | 37.5 | 14 | 248.1 | 42.0 |
| Supra-foveal | 32 | 271.8 | 50.4 | 14 | 273.1 | 58.6 | |
| Infra-foveal | 30 | 275.3 | 43.0 | 14 | 259.6 | 50.7 | |
| Mean VD | Foveal | 39 | 148.5 | 28.1 | 14 | 152.6 | 26.9 |
| Supra-foveal | 32 | 173.9 | 36.8 | 14 | 174.8 | 37.0 | |
| Infra-foveal | 30 | 159.5 | 26.6 | 14 | 162.4 | 33.5 | |
| Mean ratio | Foveal | 39 | 0.614 | 0.086 | 14 | 0.618 | 0.055 |
| Supra-foveal | 32 | 0.660 | 0.242 | 14 | 0.644 | 0.059 | |
| Infra-foveal | 30 | 0.582 | 0.150 | 14 | 0.628 | 0.065 | |
Supra-foveal is defined as 2 mm superiorly to the fovea; infra-foveal is defined as 2 mm inferiorly to the fovea.