A Scientist Accidentally Developed Sunglasses That Could Correct Color Blindness

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5. A couple of images describing what the glasses do.

An overview of how it works.

A couple of images from the overview:

Figure 3 ~ Cone cells in the eyes of people with normal vision detect a range of wavelengths. When wavelengths of 520 nm reach the eye of someone with normal vision, red cone cells are excited to about 55% and green cones are around 90% activated. In protanomaly and deuteranomaly, the spectrum of the red or green cone is moved slightly closer to the other, which changes the level of activation of the mutated cone.


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Figure 4 ~ The many layers in the lenses of EnChroma sunglasses filter out specific wavelengths of light such that the proper combination of cones is activated. This allows people with CVD to see shades of color they have never seen before.