lens
/lenz; lɛnz/ n
(pl ~es)
1 piece of glass or other transparent material with one or more curved surfaces used to make things appear clearer, larger or smaller when viewed through it, and used in spectacles, cameras, telescopes, etc 透镜; 镜片. =>illus at camera, glasses (glass) 见camera、 glasses (glass) 插图.
2 (anatomy 解) transparent part of the eye, behind the pupil, that focuses light （眼球的）晶状体. =>illus at eye 见eye插图.