Question Detail

PHY 104 The Human Eye Objective Question
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Question

For a presbyopic eye, why is a converging lens used for correction?
Options
A Because the eye's lens has become too powerful and needs to be weakened.
B To diverge rays before they enter the eye, pushing the focal point further back.
C Because the eye cannot focus on close objects, a converging lens helps bring the rays to focus on the retina at a shorter distance.
Correct Answer
D To flatten the image on the retina and reduce distortion.
Correct Answer

Option C is the correct answer.

Detailed Explanation

The document explains: 'For a presbyopic or hyperopic (long sighted eye), the near point is farther from the eye than normal... and the eye forms an image beyond the retina. To correct this defect, a converging lens is used to focus the image on the retina (i.e. the rays converge at a shorter distance).'

Hint

A converging lens adds power to the eye's optical system.

Question Info

Course: PHY 104
Topic: The Human Eye
Type: Objective
Difficulty: Not specified
Question 650 of 947
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