adj.双焦点的
n.双重焦点透镜；双光眼镜
Some manufacturers are also developing bifocal IOLS, which may eliminate the need in some patients for prescription glasses after surgery. 有的制造商在研究双焦点的人工晶体，这可能会让一些手术后需要用处方眼镜的患者不再需要眼镜。
n.远近视两用眼镜
