Table 1.

Age and sex distribution of different types of refractive errors in a Yemeni population 0–30 years (N = 1,500)

Subgroup	Sample	Myopia (N = 500)		Hyperopia (N = 800)		Astigmatism (N = 200)
		N	%	N	%	N	%
Age group
0–6	125	35	28.0	90	72.0	0	0
7–12	220	65	29.5	120	54.6	35	15.9
13–18	413	90	21.8	280	67.8	43	10.4
19–24	372	135	36.3	170	45.7	67	18.0
25–30	370	175	47.3	140	37.8	55	14.9
Sex
Male	700	300	42.9	300	42.9	100	14.3
Female	800	200	25.0	500	62.5	100	12.5
Total	1500	500	33.3	800	53.3	200	13.4