Colour vision deficiency

Approximately one man in 13 and one woman in 250 perceive colours in a markedly different way from the remainder of the population. The other 92% of the population do not perceive colours in exactly the same way, the cone 

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Lawrenson JG, Kelly C, Lawrenson AL, Birch J. Acquired colour vision deficiency in patients receiving digoxin maintenance therapy. Br J Ophthalmol 2002 86(11) 1259-61. 

Selection and training of appropriately qualified and motivated persons for participation in analytical panels is essential to effective performance. Individuals participating in panels in which colour judgements are involved should have been screened for colour vision deficiencies using Ishihara charts. However, other tests may be necessary for the optimal performance of certain... 

A deficiency of this fat-soluble vitamin may result in total blindness. Found in spinach, carrots, sweet potatoes, and cantaloupe, it is responsible for maintaining good colour vision and night vision. 

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