Bifocals

Bifocals are eyeglasses with two distinct optical powers. Bifocals are commonly prescribed to people with presbyopia who also require a correction for myopia, hyperopia, and/or astigmatism.

单词	Bifocal glasses
释义	Bifocal glasses 原声例句 who was 系列 He was an inventor. Thanks to him, we have lightning rods and bifocal glasses. 他是一位发明家。多亏了他，我们才有了避雷针和双焦点眼镜。英语百科 Bifocals Bifocals are eyeglasses with two distinct optical powers. Bifocals are commonly prescribed to people with presbyopia who also require a correction for myopia, hyperopia, and/or astigmatism.
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Bifocal glasses

Bifocals