Special Corrective Glasses Can Minimize Colourblindess

Currently available in four US states, the technology used by EnChroma, a company based in Berkeley, Calif., was developed in 2010 with funding from the National Institutes of Health. Eyeglasses with EnChroma cost about $269 to $349. They can also be made with prescription lenses. The lenses are effective for about four out of five people with red-green color vision deficiency. They are not a cure for colorblindness.

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