Myopia prevention device

The utility model discloses a myopia prevention device which comprises a shell, a swing mechanism, a control mainboard, a distance sensor, a timing displayer and a warning lamp, an installation inner cavity is formed in the shell, the swing mechanism is connected to the installation inner cavity, the distance sensor is movably connected to the swing mechanism, and the control mainboard is connected to the control mainboard. The swing mechanism enables the distance sensor to swing within a first angle range in the vertical direction of the shell; the control main board is connected to the interior of the mounting inner cavity, the distance sensor is electrically connected with the control main board, and the control main board is electrically connected with the swing mechanism; the timing display and the warning lamp are both connected to the shell, and the control main board is electrically connected with the timing display and the warning lamp. According to the technical scheme, the prevention efficiency can