Researchers have incorporated ultra-thin optical devices known as metasurfaces into off-the-shelf contact lenses to correct deuteranomaly, a form of red-green color blindness. The new customizable contact lens could offer a convenient and comfortable way to help people who experience various forms of color blindness.
from Health & Medicine News -- ScienceDaily https://www.sciencedaily.com/releases/2020/03/200305002821.htm
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