| 摘要 |
An eyeglasses enhancement comprised of a supplementary lens frame additionally installed on an eyeglass temple. The supplementary lens frame is folded and unfolded on the eyeglass temple. When unfolded, the supplementary lens fitted therein is angled freely into position in front of the main lens. Due to the specific optical characteristics of the main lens, the unfolded supplementary lens allows the eyeglass wearer to have two different focal lengths available to thereby simply, conveniently and, furthermore, clearly view objects at close distances.
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