Anti-sleep blink sensor lens
This simple function will then “jolt” the eyes and make them focus, thus waking you up before you drop off fully. Men blink once every three seconds; women once every four seconds. So any longer than this and you are slowing down, which generally means you are getting sleepy. Don’t let yourself fall asleep at your desk again! This set of glasses and frames is compact and lightweight, and powered by a USB and/or battery that can go for eight hours. $ 331
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