Abstract: Eyewear is disclosed for use in sports and the like which allows the wearer to adjust the flow of air across the inside surface of the lens without having to remove the eyewear. The eyewear includes a frame shaped to fit a wearer's face, one or two lenses mounted in the frame, and a temple bracket mounted on each side of the frame. Each temple bracket has a front surface substantially contiguous with the front surface of the frame and containing an inlet opening. An inner surface of each temple bracket contains an outlet opening and a passageway connecting the inlet opening and outlet opening. A block is positioned for sliding movement in the passageway and is connected to a button mounted for sliding movement on the outer surface of each temple bracket.