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Table 3 Principal cause of blindness, Severe Visual Impairment (VI), Moderate (MVI) and Early Visual Impairment (EVI) in persons

From: Prevalence and causes of blindness, visual impairment among different ethnical minority groups in Xinjiang Uygur autonomous region, China

  Blindness Severe VI Moderate VI Early VI
% % % %
1. Uncorrected Refractive Error 1.4% 16.3% 23.8% 49.1%
3. Cataract untreated 65.2% 34.7% 34.3% 23.0%
4. Cataract surgical complications 2.9% 0.0% 0.7% 0.4%
6. Non Trachomatous corneal opacity 1.4% 4.1% 7.0% 3.5%
8. Myopic retinopathy 8.7% 12.2% 4.9% 2.7%
9. Glaucoma 4.3% 0.0% 2.1% 1.3%
10. Diabetic retinopathy 2.9% 4.1% 2.1% 0.9%
11. ARMD 4.3% 18.4% 17.5% 13.3%
12. Other posterior segment disease 5.8% 10.2% 5.6% 4.9%
13. All other globe/CNS abnormalitiesa 2.9% 0.0% 2.1% 0.9%
Total 100.0% 100.0% 100.0% 100.00%
A. Treatable (1,2,3) 66.7% 51.0% 58.0% 72.1%
B. Preventable (PHC/PEC services) (5,6,7,8) 10.1% 16.3% 11.9% 6.2%
C. Preventable (Ophthalmic services) (4,9,10) 10.1% 4.1% 4.9% 2.7%
D. Avoidable (A + B + C) 87.0% 71.4% 74.8% 81.0%
E. Posterior segment causes (8,9,10,11,12) 26.1% 44.9% 32.2% 23.0%
  1. aAll other globe/CNS abnormalities: Microphthalmos, anophthalmos, enucleated eye, amblyopia