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Number of participants able to reach threshold acuity measurements on each of the pediatric tests for the different test distances shown.

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posted on 02.02.2017 by Nicola S. Anstice, Robert J. Jacobs, Samantha K. Simkin, Melissa Thomson, Benjamin Thompson, Andrew V. Collins

Only the ETDRS chart allowed for threshold measurements at the standard (3 m) testing distance for all participants. The number of children able to provide results on the ETDRS chart was less.

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