Question Detail

PHY 104 The Human Eye Objective Question
Take CBT

Question

What happens to the ciliary muscle and the lens's curvature when a normal eye accommodates to see a closer object?
Options
A The ciliary muscle relaxes, and the lens becomes flatter.
B The ciliary muscle contracts, and the lens becomes flatter.
C The ciliary muscle relaxes, and the lens bulges (increases curvature).
D The ciliary muscle contracts, and the lens bulges (increases curvature).
Correct Answer
Correct Answer

Option D is the correct answer.

Detailed Explanation

The document states: '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.' Increased curvature means a 'bulged' lens.

Hint

To focus on closer objects, the focal length of the lens needs to decrease, which requires a more powerful, more curved lens.

Question Info

Course: PHY 104
Topic: The Human Eye
Type: Objective
Difficulty: Not specified
Question 648 of 947
Previous Course Details Next