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Color blindness - Medical Encyclopedia (Site not responding. Last check: 2007-11-02) |
 | | Other forms of color blindness are much much rarer, like blue-yellow, and the rarest being complete color blindess (achromatopsia, or maskun), where one can see only shades of grey. |
| | Deuteranopia: lacking the green receptor cones in the retina; those affected are unable to distinguish between red and green. |
| | (Dalton's diagnosis was confirmed as deuteranopia in 1995, some 150 years after his death, by DNA analysis of his preserved eyeball.) |
| www.nursingstudy.com /encyclopedia/Color_blindness.html (575 words) |
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