| 摘要 |
The invention is a one-piece clip-on accessory (150) for superimposing auxiliary optical elements (158) such as tinted lenses or reading or corrective lenses on lenses of a pair of eyeglasses. In its preferred form, the clip-on solves many of the problems associated with prior art clip-ons insofar as it is lightweight and frameless, with minimal interference with the spectacle frame (700) thereby retaining the original profile of the spectacle frame.
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