An individual transitions from looking at a distant mountain peak in bright sunlight to reading a map held 25 cm away in the shade. Which of the following correctly describes the changes that occur in the ciliary muscles, suspensory ligaments, and iris muscles of the eye to focus on the map in dimmer light?
Ciliary muscles contract, suspensory ligaments slacken, and circular iris muscles contract.
Ciliary muscles contract, suspensory ligaments slacken, and radial iris muscles contract.
Ciliary muscles relax, suspensory ligaments tighten, and radial iris muscles contract.
Ciliary muscles relax, suspensory ligaments tighten, and circular iris muscles contract.
