Color Blind Glasses
Color blind glasses or color correcting lenses are light filters. It is usually in the form of glasses or contact lenses, that attempt to alleviate color blindness. It can be brought by deficient color vision closer to normal vision or to make certain color tasks easier to accomplish. It can work for some people with red-green color blindness. Most colorblind glasses cost between $100 & $450 without prescription lenses.
How does it work?
Lenses for colorblindness glasses are made with minerals that filter out some of the wavelengths between green & red. A portion of the light rays coming through the lenses are blocked, reducing the overlap of the red & green light wavelengths. This allows the brain to receive a clearer signal to help distinguish between the two colors.
Varieties:
- Disparate lenses: using different filters over each eye.
- Monocular lenses: using a filter on only one eye.
- Binocular lenses: using the same filter over both eyes.
EnChroma Glasses:
EnChroma glasses are designed to improve color vision of people with forms of anomalous trichromacy, which are estimated to comprise four out of five cases of color blindness. The most common types are Protanomaly and Deuteranomaly, which are forms of partial red-green color blindness.
The complete absence of one of the cone photopigments, called Protanopia or Deuteranopia, are considered dichromats who may see limited to no results dur to the complete inability to see red & green color differences.