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When the distance between eyes and the phone is over the safe limit, the screen stays clear; when the distance is within the safe limit, the screen becomes vague.With a detector sensing the distance between eyes and the phone, this Eye-protection Screen can change its visual acuity with the difference of distance in order to remind people to keep a safe distance from the screen and to avoid unconscious damage to the eyes when staring at the screen.
Yicong Lu Shihong Lv Hanxin Jin Kun Dong