Research Article
The Prevalence and Causes of Visual Impairment in Type 2 Diabetes Mellitus in Northeast China
Table 4
Causes of blindness and low vision according to the best-corrected visual acuity.
| | Causes | Better-seeing eye (WHO standard) | Better-seeing eye (US standard) | | Blindness | Low vision＃ | Blindness | Low vision＃ | | No. (%) | No. (%) | No. (%) | No. (%) |
| | Diabetic retinopathy | 5 (45.4) | 14 (26.9) | 9 (40.9) | 31 (24.4) | | Proliferative diabetic retinopathy | 5 (45.4) | 6 (11.5) | 8 (36.4) | 6 (4.9) | | Diabetic maculopathy | 0 (0.0) | 8 (15.4) | 1 (4.5) | 25 (19.5) | | Cataract | 4 (36.4) | 24 (46.2) | 7 (31.8) | 65 (50.8) | | Myopic maculopathy | 2 (18.2) | 10 (19.2) | 5 (22.7) | 18 (14.1) | | Glaucoma | 0 (0.0) | 1 (1.9) | 0 (0.0) | 1 (0.8) | | Age-related macular degeneration | 0 (0.0) | 1 (1.9) | 0 (0.0) | 3 (1.9) | | Amblyopia | 0 (0.0) | 1 (1.9) | 1 (4.5) | 0 (0.0) | | Myopic degeneration | 0 (0.0) | 0 (0.0) | 0 (0.0) | 2 (1.6) | | Others | 0 (0.0) | 0 (0.0) | 0 (0.0) | 2 (1.6) | | Uncertain | 0 (0.0) | 1 (1.9) | 0 (0.0) | 6 (4.7) | | Total | 11 (100) | 52 (100) | 22 (100) | 128 (100) |
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Defined as visual acuity <20/400. ＃Defined as visual acuity <20/60 and ≥20/400. |
