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| ISHIHARA
Colour Chart Book from Kanehara, Japan |
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The Ishihara's Tests of 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.
The third type is the 14-plate (Concised) Edition.
The fourth type is the 10-plate (for unlettered persons)
Edition or the test for colour deficiency for infants. The Charts
of the "Tests for Colour Deficiency," including that of
the Dr. Ishihara, used numerals as the basis for judging color-deficiency.
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