An anti-fog lens includes an optical body, made of polycarbonates, and an anti-fog film combination located at a rear surface of the optical body. The anti-fog film combination is constructed of an anti-fog film made of triacetate, and a polycarbonate film, which are joined together by spreading an optical adhesive therebetween. The optical body and the anti-fog film combination are subsequently placed in a mold into which a molten polycarbonate material is fed. As such, the optical body and the anti-fog film can be joined together after the molten polycarbonate material is cooled and solidified. Preferably, the anti-fog film has a thickness between 0.3 and 0.6 mm, and the polycarbonate film has a thickness between 0.3 and 0.6 mm. The anti-fog lens can achieve a stable and excellent performance on prevention of fog.
