| 摘要 |
An eye wear device comprising a frame and lens means supported by the frame to be positioned in front of a wearer's eyes. The improvement characterized in that the lens means is coated with an electrically conductive heat generating layer to be positioned in the wearer's field of vision when the eye wear is worn, and of sufficient resistance to produce enough heat to remove moisture build-up on the lens means. Contacts are provided at either end of the layer, each contact electrically associated with the layer, an electronic moisture sensor means associated with the lens means to detect a moisture build-up on the lens means, circuitry associated with the contacts and moisture sensor, in operation to be electrically connected to a power source, microchip means electrically associated with the circuitry and moisture sensor, and arranged to permit a flow of current from the power source across the layer when moisture builds up on the lens to a predetermined degree, and to stop that flow of current across the layer when the moisture level on the lens falls below a predetermined degree.
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