They might look like sunglasses, but EnChroma’s product actually boosts the saturation of red and green light.
That helps to improve color vision in people with red-green color-blindness, the most common color vision deficiency, affecting up to one in 12 men and one in 200 women (a true lack of color vision is very rare).
Most people have three types of color-sensing cones in their eyes: red, green, and blue.
The wavelengths of light that these three cones absorb have overlapping regions.
Color-blindness is often a result of a malfunctioning cone that causes wavelengths to overlap even more, resulting in poor color discrimination.
The EnChroma glasses use a filter to cut out these overlapping wavelengths, allowing for a clearer distinction between colors, especially red and green.
EnChroma’s website makes it clear that their glasses will not cure color-blindness, much as reading glasses won’t cure farsightedness.
They also are not recommended for the color vision tests required for certain jobs, including operating ships, planes, and public transportation.