Question Detail

PHY 104 The Human Eye Objective Question

Question

During the process of accommodation for focusing on closer objects, which of the following changes occurs within the eye?
Options
A The ciliary muscle relaxes.
B The lens flattens, increasing its focal length.
C The tension in the ciliary muscle increases.
Correct Answer
D The radius of curvature of the lens increases.
Correct Answer

Option C is the correct answer.

Detailed Explanation

The document explains, "In order to form a sharp image of closer objects on the retina, the tension in the ciliary muscle increases and it contracts, causing the lens to bulge and its radius of curvature to change." The bulging implies a decrease in the radius of curvature and a decrease in focal length, not an increase or flattening.

Hint

Consider the action of the ciliary muscle when the eye shifts focus from distant to near objects.

Question Info