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Ishi·ha·ra

adj :  of, relating to, or used in an Ishihara test < plates>  <the method> 
 
Ishihara, Shinobu (1879-1963),
Japanese ophthalmologist. Ishihara introduced his test for color blindness in 1917. The test calls for the discernment of figures or patterned lines formed from colored dots placed in a field of dots of another color. Ishihara also published studies of Daltonism and trachoma.
 
 

 
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