one of the case studies Dr Oliver Sacks profiled in his book An Anthropoligist on Mars was about a man, who as result of an neurological accident (i think it was a fall, it might have been a car crash) became achromatopiacist..

at first, it effect not only his art, but every aspect of his life.. (he began to destest garden fresh ripe red tomatoes, that were coal black globes, and repulsive and unappatizing to look at.)

i don't think achromatopsia is common condition, (or one that occures as a birth defect,) but it can occur as a result of stroke, or head injuries.

most color blindness is to specific parts of the spectrum, not to the whole spectrum of color.

like all of the cases Dr Sacks has profile over his years, this one is facinating.


my other obsession