| 摘要 |
<p>A shield (2) for selective fitting on a pair of spectacles (2) comprises shield glasses, a shield frame and shield guide faces (8). The spectacles comprise a spectacle frame with frame guide faces (3, 19, 20), which are oriented generally perpendicular to or in an oblique direction relative to the spectacle glasses. The spectacle guide faces and the shield guide faces are adapted to permit sliding the shield into a secured position, while preserving the mutual orientation of the shield and the glasses during a final stage of approach.</p> |
