bi·fo·cals
noun/ˌbaɪˈfəʊklz/
/ˌbaɪˈfəʊklz/
[plural]- a pair of glasses with each lens made in two parts. The upper part is for looking at things at a distance, and the lower part is for looking at things that are close to you.
双光眼镜（上半片为看远，下半片为看近） - He peered through his bifocals.
他透过双光眼镜凝视着。
- He peered through his bifocals.