| 摘要 |
A pair of fog-free protective glasses has a frame and a lens. The frame has an embedded portion and a pair of temples pivotally connecting to two ends of the embedded portion. The embedded portion has upper and lower embedded plates to define an embedded groove therebetween, and two sides of the embedded portion are respectively formed with at least one guiding structure. Each guiding structure has at least one drainage hole. The lens is embedded in the embedded groove of the frame, and is respectively formed with a guiding portion. A leading airflow is thus produced from the guiding portion through the drainage hole for reducing fog formation on the lens.
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