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It tackles the most common cause of fatality, which is the blind spot. According to Emily Brooke, 79 percent of bicycles involved in crashes are traveling straight ahead when a vehicle turns into them. Emily Brooke said Emily Brooke chose the 20-foot distance because it's half the length of a bus, and Emily Brooke wanted the laser image to be green because the human eye is most sensitive to green light. TINY, LENS-FREE CAMERA COULD HIDE IN CLOTHES, GLASSES Drivers just see it and all they need to do is not turn, not react, not turn into the cyclist or not pull out, people see it and go, ‘ What is that ? ’ And that's perfect, as long as they don't make that turn, which can be potentially fatal …. Emily Brooke said The Laserlight alerts not only drivers, but pedestrians, too, about oncoming bikes. One of the most obvious cases.