Composed of different colours that appear the same to a colour-blind person; designating a test for colour blindness that makes use of plates composed of such colours.
Origin
Late 19th century.
Definition of pseudoisochromatic in US English:
pseudoisochromatic
adjective
Ophthalmology
Composed of different colours that appear the same to a colour-blind person; designating a test for colour blindness that makes use of plates composed of such colours.