COLOUR BLINDNESS.
When sunlight is broken up into its different rays the person of normal eyesight can tell six different colours. They are red, orange, yellow, green, blue and violet. A few persons can see a seventh colour, an indigo blue. Colour blindness begins with those who can gee but five colours in the sun spectrum; they cannot identify an orangecoloured light. The next point in colour blindness is the confusion between blue and green lights. Colour blindness becomes serious when a person confuses’ green and yellow, and there are those who even cannot distinguish red from green.
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https://paperspast.natlib.govt.nz/newspapers/TS19190731.2.21
Bibliographic details
Star (Christchurch), Issue 12707, 31 July 1919, Page 4
Word Count
98COLOUR BLINDNESS. Star (Christchurch), Issue 12707, 31 July 1919, Page 4
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