1What is the human eye? Why is it called a natural optical instrument?
2What gives the eye its spherical shape?
3Why is the cornea said to act like the main lens of the eye?
4How does the size of the pupil change in bright light and in dim light? What is the benefit?
5What is the eye lens made of, and what does it do?
6Write the function of the ciliary muscles.
7Differentiate between rod cells and cone cells.
8What is the optic nerve and what does it do?
9The image on the retina is inverted. Why, then, do we see objects the right way up?
10List, in order, the media that light from an object passes through to reach the retina.
11How does a glass lens differ from the eye lens in terms of curvature?