Table 4 Causes of Visual Impairment (VI) and Blindness in the Singapore Chinese Eye Study, Based on the United States Definition.
From: Trends of Visual Impairment and Blindness in the Singapore Chinese Population over a Decade
Causes | Based on Presenting Visual Acuity | Based on Best-Corrected Visual Acuity | ||
|---|---|---|---|---|
Bilateral VI (N = 695)^ | Bilateral Blindness, (N = 22) | Bilateral VI (N = 150)^ | Bilateral Blindness (N = 8) | |
n, (%) | n, (%) | n, (%) | n, (%) | |
Under-corrected refractive error | 407 (58.6) | 5 (22.7) | 0 (0.0) | 0 (0.0) |
Cataract | 231 (33.2) | 9 (40.9) | 114 (76.0) | 4 (50.0) |
Age-related macular degeneration | 10 (1.4) | 4 (18.2) | 4 (2.7) | 2 (25.0) |
Diabetic retinopathy | 10 (1.4) | 2 (9.1) | 8 (5. | 1 (12.5) |
Posterior capsular opacity | 9 (1.3) | 0 (0.0) | 7 (4.7) | 0 (0.0) |
Myopic maculopathy | 5 (0.7) | 1 (4.5) | 7 (4.7) | 0 (0.0) |
Glaucoma | 5 (0.7) | 0 (0.0) | 0 (0.0) | 0 (0.0) |
Epiretinal membrane | 5 (0.7) | 0 (0.0) | 4 (2.7) | 0 (0.0) |
Corneal opacity | 2 (0.3) | 1 (4.5) | 0 (0.0) | 1 (12.5) |
Pterygium | 1 (0.1) | 0 (0.0) | 1 (0.7) | 0 (0.0) |
Ambylopia | 1 (0.1) | 0 (0.0) | 2 (1.3) | 0 (0.0) |
Retinal vein occlusion | 0 (0.0) | 0 (0.0) | 1 (0.7) | 0 (0.0) |
Others | 9 (1.3) | 0 (0.0) | 2 (1.3) | 0 (0.0) |
