名词

1. 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.

2. （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.

3. see also: contact lens;telephoto lens;wide-angle lens;zoom lens

1. a transparent optical device used to converge or diverge transmitted light and to form images

Synonym: lenselens system

2. electronic equipment that uses a magnetic or electric field in order to focus a beam of electrons

Synonym: electron lens

3. biconvex transparent body situated behind the iris in the eye
its role (along with the cornea) is to focuses light on the retina

Synonym: crystalline lenslens of the eye

4. (metaphor) a channel through which something can be seen or understood

e.g. the writer is the lens through which history can be seen