protanopia - meaning and definition. What is protanopia
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What (who) is protanopia - definition

INABILITY OR DECREASED ABILITY TO SEE COLOUR, OR PERCEIVE COLOUR DIFFERENCES, UNDER NORMAL LIGHTING CONDITIONS
Colour-blindness; Color blind; Color-blind; Colour-blind; Colour blind; Colour blindness; Colorblindness; Color-blindness; Colourblind; Colourblindness; Color Blind; Protanopia; Deuteranopia; Colour Vision Deficiency; Protanope; Tritanopia; Colour-Blindness; Deuteranope; Tritanope; Colour Blindness; Color vision deficiency; Anomalous trichromacy; Colour vision deficiencies; Red-green colorblindness; Loss of color vision; Red-green color blindness; Color vision defects; Protanomaly; Deuteranomaly; Color vision deficiencies; Tritanomaly; Colour Blind; Daltonian; Dyschromatopsia; Acritochromacy; Colour vision deficiency; Color Blindness; Blue-yellow color blindness; Red-green colour blindness; Red green colour blindness; Colour visual impairment; Colorblind; Red-Green color blindness; Daltonist; Red–green colorblindness; Red green colourblind; Red-green colorblind; Red–green color blindness; Red/green color blindness; Tritanoptic; Tritanopic; Dyschromotopsia; Color impaired; Achloropsia; Red/green colorblind; Color anomaly; Color deficiency; Red-green color blind; Red/green colour blindness; Red–green color blind; Red-green colourblind; Red-green colourblindness; Color-corrective glasses; Deutanopia
  • Simulation of the normal (above) and dichromatic (below) perception of red and green apples
  • Three sequential colormaps that have been designed to be accessible to the color blind.
  • Confusion Lines for the three types of Dichromacy superimposed on CIEXYZ color space.
  • date=March 2023}}
  • Horizontal traffic light in [[Halifax, Nova Scotia]], Canada
  • fovea]] of an individual with normal color vision (left), and a color blind (protanopic) retina. The center of the fovea holds very few blue-sensitive cones.
  • Colors of [[Boardgame]] pieces must be carefully chosen to be colorblind-accessible
  • Punnett squares for each combination of parents' color vision status giving probabilities of their offsprings' status; A superscript 'c' denotes a chromosome with an affected gene
  • Testing the colors of a web chart, ''(center)'', to ensure that no information is lost to the various forms of color blindness.
  • The lack of standard positional clues makes this light difficult to interpret.
  • The infamous inverted traffic light in Syracuse, NY
  • An 1895 illustration of normal vision and various kinds of color blindness.

protanopia         
[?pr??t?'n??p??]
¦ noun colour blindness resulting from insensitivity to red light, causing confusion of greens, reds, and yellows. Compare with deuteranopia, tritanopia.
Origin
early 20th cent.: from proto- 'original' (red being regarded as the first component of colour vision) + an-1 + -opia.
Daltonian         
·noun One afflicted with color blindness.
protanope         
['pr??t(?)n??p]
¦ noun a person suffering from protanopia.

Wikipedia

Color blindness

Color blindness or color vision deficiency (CVD) is the decreased ability to see color or differences in color. It can impair tasks such as selecting ripe fruit, choosing clothing, and reading traffic lights. Color blindness may make some academic activities more difficult. However, issues are generally minor, and the colorblind automatically develop adaptations and coping mechanisms. People with total color blindness (achromatopsia) may also be uncomfortable in bright environments and have decreased visual acuity.

The most common cause of color blindness is an inherited problem or variation in the functionality of one or more of the three classes of cone cells in the retina, which mediate color vision. The most common form is caused by a genetic disorder called congenital red–green color blindness. Males are more likely to be color blind than females, because the genes responsible for the most common forms of color blindness are on the X chromosome. Non-color-blind females can carry genes for color blindness and pass them on to their children. Color blindness can also result from physical or chemical damage to the eye, the optic nerve, or parts of the brain. Screening for color blindness is typically done with the Ishihara color test.

There is no cure for color blindness. Diagnosis may allow an individual, or their parents/teachers to actively accommodate the condition. Special lenses such as EnChroma glasses or X-chrom contact lenses may help people with red–green color blindness at some color tasks, but they do not grant the wearer "normal color vision". Mobile apps can help people identify colors.

Red–green color blindness is the most common form, followed by blue–yellow color blindness and total color blindness. Red–green color blindness affects up to 1 in 12 males (8%) and 1 in 200 females (0.5%). The ability to see color also decreases in old age. In certain countries, color blindness may make people ineligible for certain jobs, such as those of aircraft pilots, train drivers, crane operators, and people in the armed forces. The effect of color blindness on artistic ability is controversial, but a number of famous artists are believed to have been color blind.