protanopia

Từ điển Oxford Learners Wordfinder Dictionary

noun

dichromacy characterized by lowered sensitivity to long wavelengths of light resulting in an inability to distinguish red and purplish blue
• Syn:
red-blindness
• Derivationally related forms:
red-blind (for: red-blindness), protanopic
• Hypernyms:
red-green dichromacy, red-green color blindness, red-green colour blindness