Sentence:  The Ishihara plates were developed for the assessment of congenital colour anomalies (<WSD>Daltonism</WSD>) and so there is considerable detail in the testing that is not relevant to optic nerve disease where the losses do not follow the specific patterns seen in <WSD>Daltonism</WSD> but show largely global losses. 
Meaning of the word marked with <WSD> tags:  Inability or defective ability to perceive or distinguish certain colors, especially red-green color blindness.