Table 3

Principal causes of blindness and visual impairment with available correction

CauseEMVISVIBlindAll VI
<6/12-6/60
n (%)
<6/60-3/60
n (%)
<3/60
n (%)
<6/12-NPL
n (%)
Cataract447 (66.5)39 (76.5)100 (69.9)586 (67.7)
Refractive error137 (20.4)0 (0)1 (0.7)138 (15.9)
Glaucoma10 (1.5)4 (7.8)10 (7.0)24 (2.8)
Non-trachoma CO14 (2.1)2 (3.9)5 (3.5)21 (2.4)
Cataract surgical complications15 (2.2)0 (0)2 (1.4)17 (2.0)
Trachoma CO2 (0.3)1 (2.0)5 (3.5)8 (0.9)
Uncorrected aphakia1 (0.1)0 (0)1 (0.7)2 (0.2)
Diabetic retinopathy1 (0.1)1 (2.0)0 (0)2 (0.2)
AR macular degeneration2 (0.3)0 (0)0 (0.0)2 (0.2)
All globe/CNS abnormalities1 (0.1)0 (0)1 (0.7)2 (0.2)
Phthisis0 (0)0 (0)1 (0.7)1 (0.1)
Other posterior segment42 (6.3)4 (7.8)17 (11.9)63 (7.3)
Total672 (100)51 (100)143 (100)866 (100)
  • AR, age related; CNS, central nervous system; CO, corneal opacity; EMVI, early to moderate visual impairment; NPL, no perception of light; SVI, severe visual impairment; VI, visual impairment.