varifocals
美
英 
例句
All of them used varifocals and not single lens glasses, and wore them outside at least three times a week.
他们以前全部使用双镜片老花镜,而不是单镜眼镜,每周至少在户外活动三次。
However for those who spend most of their time indoors varifocals remain the best option.
然而,对于喜欢在室内活动的老年人,双镜老花镜仍然是最佳选择。