The ishihara`s tests for colour deficency consist of four(4)different types, namely, the first type is the 38-plat(completed). The ishihara`s tests for colour deficency 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 bype of color dificiency. The second type is the 24-plate(abridged) edition used principally at factories and offices of transportation and other concered places of the purpose of conducting usual sample survery for color deficiency in a short space of time when hiring new employees. The third type is the 14-plate (concised)edition. On the average, charts of highest accuracy were selected from the 38 plate(complete) edition to conduct minimum examinations of color deficiency. The forth type is the 10-plate for unlettered persons edition or the test for colour deficiency for infants. Ishihara test :labware tech have stocks of 38 plate ishihara test chart books, for color deficiency: 38 plate book, price is usd170 each .
