/ˌbaɪˈfəʊklz ||; baɪˈfokḷz/noun [pl] a pair of glasses with each piece of glass(lens)made in two parts. The top part is for looking at things at a distance, and the bottom part is for reading or for looking at things close to you. 双光眼镜，双焦点眼镜（每个镜片有两部份，上部用于看远处的事物，下部用于阅读或看近处的事物） ➔bifocal adj