Table 2

Cooperation (determination of monocular visual acuity of both eyes possible) of the 90 children re-examined in the hospital, 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
23–303314 (42%)0.54 (29%)
31–368 8 (100%)0.631 (13%)
37–4810 8 (80%)0.80 (0%)
49–601818 (100%)0.81 (6%)
60–702121 (100%)0.80 (0%)
23–709069 (77%)0.636 (9%)