Color Vision Deficiency
aka Color Blindness
What is color blindness?
Who first discovered/reported having color blindness?
Deuteranopia and Protanopia
Rainbow: Normal vs. Protanopia/Deuteranopia
Visible Color Spectrum: Normal vs. Deuteranopia
Visible Spectrum of Color: Normal vs. Tritanopia
Inheritance of Red and/or Green Color Blindness (Deuteranopia/Protanopia)
As this trait is passed down through the X chromosome, fathers cannot pass this to a son. It is also more common in boys, as the mutation only has to occur on 1 X chromosome, as opposed to 2 in girls. Numerous studies have shown that red/green color blindness affects 1 in 12 boys of Northern European ancestry and 1 in 200 girls of Northern European ancestry.
Inheritance of Blue/Yellow Color Blindness (Tritanopia)
Other plates, known as vanishing plates, contain figures that only those with good color vision can see. Hidden digit plates are plates where only colorblind people can see the figure shown. Classification plates determine whether a colorblind person is red colorblind or green colorblind. Two numbers are on the plate, and they are different colors. Someone with normal color vision can see both digits, where a red/green colorblind person can only see one or the other.
An example of a transformation plate and a vanishing plate.
An example of a hidden-digit plate and a diagnostic plate.
An example of an anomaloscope
Soon, however, those with genetically inherited color blindness may be able to find a cure. Scientists are working on one now! Hopefully, this new treatment will debut shortly.
*NOTE*: If the color blindness is caused by another condition, such as diabetes or Alzheimer's, then treating the underlying condition may help with treating the color blindness.