An individual eyeglass lens in which the vertical distance from the near reference point to the far distance point amounts to max. A gameboard device of the present disclosure comprises a housing with a screen extending across the top thereof, and a mobile computer positioned within the housing. The lower receiving container includes a heat sinking part and a rigid part having a strength greater than the heat sinking part. The system has all the electronic circuitry and memories necessary for its desired satisfactory functioning. , then rapidly cooling the mixture to a temperature of 57-65 F. The control unit controls a voltage supplied to the electrode.