Which of the following is not a part of the human eye?
(a) the lens moves in or out
(b) the retina moves in or out
(c) the lens becomes thicker or thinner
(d) the pupil becomes larger or smaller
How does the eye change in order to focus on near or distant objects?
The lens which detective uses to see the things larger or bigger, which is thicker in the middle and thinner at the edges. This type of lens is called _________.