Table 1.

WHO categories of vision among the students

WHO category	Level of vision	No of students	%
1 No impairment	6/6–6/18	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 Blind	NPL	59	41.5
Total		142	100

PL = perception of light, NPL = no perception of light.