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Xanthopsia (or yellow-sighted) refers to the predominance of yellow in vision due to a yellowing of the optic media of the eye. In this condition everything seen has a yellowish tinge.
The most common cause is digoxin's inhibitory action on the Sodium pump, and the development of cataracts which can cause a yellow filtering effect.
It has been suggested that digitalis-derived digoxin, used to treat heart failure, induced xanthopsia responsible for the yellow tinting exhibited by many of Van Gogh's works. 
Xanthopsia is also a rare side-effect of Jaundice, in which bilirubin may be deposited into the eye in sufficient quantity to produce a yellow tint to the vision.
The condition can be artificially induced by adapting the eye with blue light.
- ↑ Weatherall, D. J.; Ledingham, J. G. G.; Warrell, D. A. (1996). Oxford Textbook of Medicine. 3rd ed. Oxford: Oxford University Press. 2055.
- ↑ Reber, AS & Reber ES (2001). Dictionary of Psychology, 3rd ed. London:Penguin.