The Human Eye: Function Quiz

What is the process called that allows the eye to focus on near and distant objects?

• Accommodation

• Dilation

• Refraction

• Contraction

What happens to the ciliary muscles when an object is close up?

• They loosen

• They relax

• They contract

• They tighten

When the ciliary muscles contract, what happens to the suspensory ligaments?

• They loosen

• They relax

• They contract

• They tighten

What shape does the lens become when focusing on a near object?

• Thinner

• Fatter

• Flatter

• Curved

How is light refracted when the lens is fatter?

• Less

• Equally

• More

• Not at all

What happens to the ciliary muscles when an object is far away?

• They contract

• They relax

• They tighten

• They loosen

What happens to the suspensory ligaments when the ciliary muscles relax?

• They tighten

• They contract

• They loosen

• They relax

What shape does the lens become when focusing on a distant object?

• Thinner

• Fatter

• Curved

• Flat

How is light refracted when the lens is thinner?

• More

• Less

• Not at all

• Equally

What is the pupil reflex responsible for?

• Changing lens shape

• Protecting the retina

• Adjusting eye color

• Focusing on objects