科丁顿放大镜实质上是一个球，球面上开槽，使得孔径小于眼的瞳孔。

The coddington is essentially a sphere with a slot cut in it to allow an aperture smaller than the pupil of the eye.

youdao

科丁顿放大镜实质上是一个球，球面上开槽，使得孔径小于眼的瞳孔。

The coddington is essentially a sphere with a slot cut in it to allow an aperture smaller than the pupil of the eye.

youdao