Stereo Butter Fly Acuity Test W/ LEA Symbols

this test is the layer symbols distance test for three meters for older children because it has three sets are the symbols in the lower parts so that the children have no possibility of learning by heart the structure of the lower part of the test the testing is very much the same as always we first agree about the names of the symbols and then ask the child what is the first symbol on each line going quickly down and this way we come to the threshold level very quickly and when the child makes an error or hesitates then we go one line up and ask the child to read all those symbols and if the child gets at least three out of five correct and then we might be at the threshold but this time the child may have focused more carefully than before and we can try on this line where the answer first was incorrect and quite often the child may get a three out of five a and four out of five corre