An older man tells a nurse. "The doctor says I have something wrong with my eyes, something called presbyopia. Can you explain why I have this? I was always fortunate to have good eyesight." The nurse formulates a response based on the knowledge that:

The lens of the eye loses elasticity causing a loss of focus for near objects.

The cornea of the eye becomes thicker and less curved causing an increase in astigmatism.

The cornea of the eye forms a gray ring at the edges.

The lens of the eye increases in opacity causing a decrease in light refraction.