The diameter of the pupil is regulated by which of the following?
A. Muscle fibres of the iris
B. Sclera
C. Choroid layer
D. Muscle fibres of the lens
Answer:A
The diameter of the pupil is regulated by which of the following?
A. Muscle fibres of the iris B. Sclera C. Choroid layer D. Muscle fibres of the lens
Explanation: The diameter of the pupil is regulated by the muscle fibres of the iris. The eyeball contains a transparent crystalline lens which is held in place by the ligaments attached to the ciliary body.