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. 2017 Oct 7;102(6):761–766. doi: 10.1136/bjophthalmol-2017-310691

Table 1.

Testability

Age n Non-cooperative Testability (%)
3.0 3 yo 233 929 36 75 84.5 91.9
3.5 696 39 94.3
4.0 4 yo 638 806 14 14 97.8 98.3
4.5 168 0 100.0
Total 1735 89 94.9

yo, year old.