Ishihara's Test for Colorblindness 38 Plates The Ishihara`s Tests for Colour Deficiency consist of four (4)different types, namely, The first type is the 38-Plate(Complete) Edition,used principally by Ophthalmologists in order to classify completely the type of color deficiency. The second type is the 24-plate(Abridged) Edition used principally at factories and offices of transportation and other concerned places of the purpose of conducting usual sample survey for color deficiency in a short space of time when hiring new employees. The third type is the 14-plate(Concise)edition. On the average, charts of highest accuracy were selected from the 38 plate(Complete) Edition to conduct minimum examinations of color deficiency.
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