Table 2

Causes of bilateral and unilateral low vision and blindness

Total (% contributing to low vision)
Bilateral low visionBilateral blindnessUnilateral low visionUnilateral blindness
*Specified cause was present in one or both eyes in patients who met the criteria for visual impairment in the worse eye.
27 participants were not examined as 14 were not contactable, 8 moved to another area, 1 refused, and 4 died.
Primary cause of vision loss
    Uncorrected refractive error4 (12.9)0 (0.0)3 (12.0)0 (0.0)
    Cataract19 (61.3)5 (62.5)12 (48.0)0 (0.0)
    Amblyopia4 (12.9)0 (0.0)1 (4.0)1 (50.0)
    Age related macular degeneration0 (0.0)1 (12.5)2 (8.0)0 (0.0)
    Macular hole0 (0.0)0 (0.0)1 (4.0)0 (0.0)
    Optic atrophy0 (0.0)0 (0.0)1 (4.0)0 (0.0)
    Trauma0 (0.0)0 (0.0)0 (0.0)1 (50.0)
    No obvious ocular disease4 (12.9)2 (25.0)5 (20.0)0 (0.0)
Total31 (100)8 (100)25 (100)2 (100)