Table 1

Cooperation (determination of monocular visual acuity of both eyes possible) of 385 children coming to a paediatric routine examination. 10% quantiles (α0.1) for visual acuity (Lea single symbols) of the “better” eye of each child and children who had an acuity difference >1 line between both eyes

Age (months)NoCooperation/rateα0.1Difference >1 line
21–30156 13 (8%)0.32 2 (15%)
31–3616 9 (56%)0.63 0 (0%)
37–4871 54 (76%)1.0 6 (11%)
49–6063 60 (95%)0.8015 (25%)
60–9379 72 (91%)1.013 (18%)
21–93385208 (54%)0.8036 (17%)