| abstract |
The utility model provides a kind of vision protection device, comprises a range finder module, a single-chip microcomputer, distance display module and a power supply; Described range finder module, distance display module are connected with single-chip microcomputer respectively, and described range finder module, distance display module are connected with power supply respectively.Of the present utility model have light-metering, range finding, timing three zones simultaneously, meeting automatic-prompting is write if too close, measure user to write or the intensity of illumination of reading environment, and allow under the prompting of time and oneself after writing for a long time or reading, do suitable rest and adjustment, diverse in function, can effectively solve teenager's visual problems. |