bifocals

1. N-PLURAL Bifocals are glasses with lenses made in two halves. The top part is for looking at things some distance away, and the bottom part is for reading and looking at things that are close. 双光眼镜

Mrs. Bierce wears thick bifocal lenses. 比尔斯夫人戴着一副厚厚的双光眼镜。