Table 3

Comparison of studies reporting prevalence of poor visual acuity (worse than 0.30logMAR)

AuthorCommunityAge (years)Number of participantsPrevalence (%)
Robaei et al19Australia6–7   17380.9
Friedman et al21USA2.5–5.5   17141.5
Williams et al23
O'Donoghue et al30
Bristol, UK
Northern Ireland, UK
7
6–7
   7825
     392
0.6
1.5
Bruce et alBradford, UK4–511 1864.0