| 摘要 |
The double toroid flexible sheet lens is for use with an eyewear frame. The lens defines first and second separate lens elements and a flat bridge part spacedly integrally interconnecting the first and second lens elements . The bridge part includes a nose opening for free passage of the wearer's nose. Each separate, distinct lens element: is of generally toroidal shape; is adapted to register with a corresponding one of the two eyes of a wearer; defines an interior wall in facing register with the wearer's face and an exterior wall; includes a closed loop flange transversely carried by the interior wall of the lens element integrally thereto so as to form a generally open pocket; and also includes a pair of top lips for releasable operative attachment into the U-channel of to the eyewear frame.
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