Table 1.

Prevalence of presenting visual impairment (decreased visual acuity with an ophthalmic etiology) stratified by age group, ethnicity and type of visual impairment.

Type of Visual impairment	Asian					Non-Hispanic White
	Age (months)					Age (months)
	30–35 (n=71)	36–47 (n=243)	48–59 (n=282)	60–72 (n=316)	Total (n=912)	30–35 (n=77)	36–47 (n=258)	48–59 (n=267)	60–72 (n=326)	Total (n=928)
Worse eye, stratified by resolution with retesting protocol:* n (% of age group) (95% CI**)
Non-resolving	0	4 (1.6)	6 (2.1)	0	10 (1.1)	0	3 (1.2)	3 (1.1)	5 (1.5)	11 (1.2)
Resolving, with refractive error	2 (2.8)	2 (0.8)	9 (3.2)	8 (2.5)	21 (2.3)	0	3 (1.2)	7 (2.6)	3 (0.9)	13 (1.4)
Total	2 (2.8) (0.3–9.8)	6 (2.5) (0.9–5.3)	15 (5.3) (3.0–8.6)	8 (2.5) (1.1–4.9)	31 (3.4) (2.3–4.8)	0	6 (2.3) (0.9–5.0)	10 (3.7) (1.8–6.8)	8 (2.5) (1.1–4.8)	24 (2.6) (1.7–3.8)
Better eye, stratified by resolution with retesting protocol: n (% of age group) (95% CI)
Non-resolving	0	0	2 (0.7)	0	2 (0.2)	0	1 (0.4)	1 (0.4)	2 (0.6)	4 (0.4)
Resolving, with refractive error	0	1 (0.4)	1 (0.4)	3 (0.9)	5 (0.5)	0	1 (0.4)	0	2 (0.6)	3 (0.3)
Total	0	1 (0.4) (0.0–2.3)	3 (1.1) (0.2–3.1)	3 (0.9) (0.2–2.8)	7 (0.8) (0.3–1.6)	0	2 (0.8) (0.1–2.8)	1 (0.4) (0.0–2.1)	4 (1.2) (0.3–3.1)	7 (0.8) (0.3–1.6)

^*Non-resolving: visual impairment by best measured as well as presenting visual acuity. Resolving, with refractive error: resolved during retesting protocol (Figure 1), with significant uncorrected refractive error at presentation: spherical equivalent (SE) hyperopia 3.0 diopters (D) or more, SE myopia 0.5 D or more, astigmatism 2.0 D or more at any age, or astigmatism 1.5 D or more for children >36 months of age.

^**CI: confidence interval (Exact 95% binomial confidence interval; calculated for total visual impairment in each age category).