1N-COUNT 透镜;镜片 A lens is a thin curved piece of glass or plastic used in things such as cameras, telescopes, and pairs of glasses. You look through a lens in order to make things look larger, smaller, or clearer. 透镜;镜片
...a camera lens.
照相机镜头
I packed your sunglasses with the green lenses.
我把你那副绿色镜片的太阳镜装好了。
2N-COUNT [usually singular](眼球的)晶状体 In your eye, the lens is the part behind the pupil that focuses light and helps you to see clearly. (眼球的)晶状体