A person is reading a book indoors and then looks out of the window at a distant tree.
State the term that describes the eye's ability to adjust its focus between near and distant objects.
Describe the changes that occur in the ciliary muscles, the suspensory ligaments, and the lens when the person shifts their focus from the near book to the distant tree.
The person then walks from the brightly-lit room into a dimly-lit hallway. Describe how the muscles in the iris react to this change, and explain the effect of this reaction.