red-blindness
/'red,blaindnis/
Học thuậtThân thiện
A person with red-blindness sees a red apple and a purple-blue plum as the same color.
Definition
- Noun:
- A form of dichromacy: Red-blindness is a specific type of color vision deficiency (dichromacy) characterized by a lowered sensitivity to long wavelengths of light. This results in an inability to distinguish between the colors red and purplish blue.
Usage
- Red-blindness is a medical/ophthalmological term used to describe a particular condition of color vision deficiency. It is more formally known as protanopia.
Examples
- Noun:
- His red-blindness makes it difficult for him to see the difference between a red and a purple traffic light.
- The test confirmed a diagnosis of red-blindness, explaining why he couldn't distinguish ripe tomatoes from the green leaves.
Advanced Usage
- Clinical Context: In optometry and ophthalmology, "red-blindness" is often used interchangeably with "protanopia" to describe the absence or severe deficiency of the long-wavelength (L) cone photopigment in the retina.
- The patient's color vision test indicated a strong case of red-blindness (protanopia).
Variants and Related Words
- Protanopia (n): The formal, technical term for red-blindness.
- Dichromacy (n): A general category of color blindness involving the absence of one type of cone photopigment; red-blindness is one type of dichromacy.
- Color blindness / Colour blindness (n): The general term for deficiencies in color vision, which includes red-blindness.
- Red-blind (adj): Describing a person who has red-blindness.
- He is red-blind and uses special software to differentiate colors on charts.
Synonyms
- Protanopia: The direct synonym and more precise scientific term.
Notes
- Red-blindness is distinct from other forms of color blindness, such as deuteranopia (green-blindness) or tritanopia (blue-blindness). It specifically affects perception of the red end of the color spectrum.
A person with red-blindness sees a red apple and a purple-blue plum as the same color.
Noun
- dichromacy characterized by lowered sensitivity to long wavelengths of light resulting in an inability to distinguish red and purplish blue