- Most of the bending of the light rays are done by the cornea.
- The shape of the lens is controlled by the ciliary muscles
Looking at a distant object:
- the ciliary muscles relax
- the suspensory ligaments tightens
- the lens is pulled into a thin shape
- the distant object is then focused on the retina
Looking at a near object:
- the ciliary muscles contract
- the suspensory ligaments slackens
- the elastic lens goes fatter
- the near object is focused on the retina
In bright lights: the circular muscles contract and the radial muscles relax --> the pupil becomes smaller and less light enters the eyes
In dim lights: the circular muscles relax and the radical muscles contract ---> the pupil becomes bigger and more light enters the eyes
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