http://www.slate.com/articles/video/video/2015/08/enchroma_glasses_color_blind_video_color_deficient_people_see_color_for.html

Don McPherson, a San Francisco-based researcher, designed protective glasses for surgeons to wear during laser surgery. But when it turned out the glasses had a surprising second utility—they helped correct color vision deficiencies and color blindness—a YouTube subgenre was born. The clips, with emotional, ebullient reactions to the glasses from people who saw corrected color for the first time, were overnight hits.