Table 11.

Comparison of Estimated Annual Incidence of Visual Impairment and Blindness by United States and World Health Organization Criteria Stratified by Age in Barbadian Afro-Caribbeans and Los Angeles Latinos

Age at baseline (years)	Visual impairment				Blindness
	LALES		BISED		LALES		BISED
	N	% (CI)	N	% (CI)	N	% (CI)	N	% (CI)
			United States Criterion*
40–49	1751	0.1 (0.0, 0.3)	978	0.1 (0.0, 0.4)	1754	‡	989	‡
50–59	1444	0.1 (0.0, 0.3)	825	0.5 (0.0, 0.9)	1446	0.1 (0.0, 0.2)	847	0.1 (0.0, 0.2)
60–69	913	0.4 (0.0, 0.8)	658	1.7 (0.7, 2.7)	931	0.1 (0.0, 0.3)	721	0.3 (0.0, 0.7)
70+	454	1.4 (0.3, 2.5)	409	5.4 (3.2, 7.6)	476	0.2 (0.0, 0.6)	533	1.8 (0.7, 3.0)
			World Health Organization Criterion†
40–49	1751	0.03 (0.0, 0.1)	986	0.1 (0.0, 0.2)	1755	‡	989	‡
50–59	1444	0.1 (0.0, 0.2)	832	0.3 (0.0, 0.7)	1446	0.1 (0.0, 0.2)	848	‡
60–69	922	0.3 (0.1, 0.7)	703	1.0 (0.3, 1.8)	932	‡	726	0.2 (0.0, 0.4)
70+	468	0.9 (0.0, 1.7)	472	3.6 (1.9, 5.2)	481	0.2 (0.0, 0.5)	549	0.7 (0.0, 1.4)

LALES = Los Angeles Latino Eye Study, BISED = Barbados Incidence Study of Eye Diseases, WHO = World Health Organization.

N= number at risk for incidence of visual Impairment/blindness at baseline. % (CI)=prevalence and 95% confidence interval; estimated from overall 4-year incidence data for LALES and BISED studies.

^*US Criterion Incidence of Visual Impairment: Persons with Baseline BCVA 20/40 or better and follow-up BCVA worse than 20/40 but better than 20/200 (not including 20/40 or 20/200). Incidence of Blindness: Persons with Baseline BCVA better than 20/200 and follow-up BCVA 20/200 or worse (including 20/200).

^†W.H.O. Criterion. Incidence of Visual Impairment: Persons with Baseline BCVA 20/60 or better and follow-up BCVA worse than 20/60 but better than or equal to 20/400 (not including 20/60 but including 20/400). Incidence of Blindness: Persons with Baseline BCVA 20/400 or better and follow-up BCVA worse 20/400 (not including 20/400).

^‡No incident cases.