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For elder people who have sight problems and a poor memory, they often encounter the problems of finding their glasses. The lumi-glasses have a sensor on each arm to sense the user’s heat. When the glasses are wore, the arms are warm, so the luminaries will not glow; when the user has put the glasses down, the heat is gone, so the luminaries will glow. Therefore, the user can easily find them when they get up in early mornings or at night. The energy of the light comes from the heat of the user.