Table 1.

Measurements of the various choroidal layers (mean ± standard deviation) in eyes without glaucoma, age-related macular degeneration, diabetic retinopathy, retinal vein occlusions, polypoidal choroidal vasculopathy or central serous choroidopathy and with an axial length less than 26.5 mm in the Beijing Eye Study 2011.

Thickness (μm)	Subfoveal	750 μm Nasal to the Fovea	750 μm Temporal to the Fovea
Small-Vessel Layer Including Choriocapillaris	30.5 ± 9.8	30.9 ± 10.3	32.6 ± 10.5
Medium-Sized Choroidal Vessel Layer (Sattler’s layer)	91.6 ± 39.0	85.1 ± 38.2	89.4 ± 36.7
Large-Sized Choroidal Vessel Layer (Haller’s layer)	155.2 ± 65.7	148.5 ± 65.3	152.9 ± 59.9
Total Choroid	277.2 ± 101.8	264.3 ± 102.6	274.9 ± 94.1
Ratio of Small-Vessel Layer (Including Choriocapillaris) Thickness to Total Choroidal Thickness	0.12 ± 0.04	0.13 ± 0.05	0.13 ± 0.04
Ratio of Medium-Sized Vessel Layer Thickness to Total Choroidal Thickness	0.33 ± 0.06	0.32 ± 0.06	0.32 ± 0.06
Ratio of Large-Sized Vessel Layer Thickness to Total Choroidal Thickness	0.55 ± 0.07	0.55 ± 0.07	0.55 ± 0.07