San Francisco, April 3 (Xinhua) -- A U.S. firm has given thousands of people their first look into the colors red and green by tricking the brain with a pair of sunglasses.
EnChroma, based in Berkeley, north of San Francisco, developed the colorblindness corrective gear two years ago and recently launched an upgraded model of sunglasses allowing users to play sports and is child-friendly.
Over 340 million people around the world suffer from colorblindness, as the condition can hinder simple everyday activities, like driving.
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