n. 先天性色盲, 红绿色盲

[医] 红绿色盲, 色盲

[ noun ]
dichromacy characterized by a lowered sensitivity to green light resulting in an inability to distinguish green and purplish-red
<noun.state>

Daltonism \Dal"ton*ism\, n.
Inability to perceive or distinguish certain colors, esp.
red; color blindness. It has various forms and degrees. So
called from the chemist Dalton, who had this infirmity.
--Nichol.