Table 1

WHO categories of vision among the students

WHO categoryLevel of visionNo of students%
PL = perception of light, NPL = no perception of light.
1 No impairment6/6–6/18 0 0
2 Visual impairment<6/18–6/60 2 1.4
3 Severe visual impairment<6/60–3/60 4 2.8
4 Blind<3/60–PL 77 54.3
5 BlindNPL 59 41.5
Total142100