Disclosed is eyewear that may have a half-jacket frame and a removable dust shield for preventing direct impingement of dust upon a wearer's eye. The eyewear may have a titanium frame and removable lenses free of any attachment structure. The frame may have a lens-retaining ridge with a thin cross section. A nosepad on the frame may carry a shield retainer for releasably affixing a shield to the frame. The nosepad and the half-jacket frame front may be cast together in one piece out of titanium or titanium alloy. An anti-slip nosepad cover may partially cover the nosepad and leave the shield retainer exposed. A removable shield may have a lower lens groove that circumferentially mates with an upper lens groove of an orbital of a half-jacket frame, thereby circumferentially completing the lens groove when the shield is in place. A rigid temple may carry a slip resistor for contacting the wearer's skin. The eyewear may have a vent to reduce fogging of the lenses and the shield may be air-permeable.