Table 1

The prevalence of refractive error and visual impairment

	N	6–7-year-olds	N	12–13-year-olds
	N	% (CIs)	N	% (CIs)
Prevalence
Myopia≤−0.50DS	11	2.8 (1.3–4.3)^* ^†	117	17.7 (13.2–22.2)^*
Hyperopia≥+2.00DS	103	26 (20–33)^* ^†	97	14.7 (9.9–19.4)^*
Uncorrected visual impairment (better eye)	11	2.8 (0.9–4.7)^*	85	12.9 (10.3–15.4)^*
Presenting visual impairment (better eye)	6	1.5 (0.2–2.9)	21	3.2 (1.2–5.1)
Uncorrected visual impairment (either eye)	39	9.9 (6.5–13.4)^*	124	19 (14–23)^*
Presenting visual impairment (either eye)	28	7.2 (4.2–10.1)	51	7.7 (6.5–13.4)