Quiz on the Eye

Which structure in the eye is responsible for refracting light rays?

• Retina

• Optic nerve

• Sclera

• Cornea

Which structure in the eye changes the shape of the lens during accommodation?

• Iris

• Ciliary muscles

• Suspensory ligaments

• Optic nerve

What is the process called when the lens changes shape to focus on near or distant objects?

• Accommodation

• Refraction

• Reflection

• Contraction

What happens to the ciliary muscles during accommodation to focus on a near object?

• They contract

• They relax

• They loosen

• They pull tight

What happens to the suspensory ligaments during accommodation to focus on a near object?

• They contract

• They relax

• They loosen

• They pull tight

What happens to the lens during accommodation to focus on a near object?

• It becomes thinner

• It becomes thicker

• It becomes longer

• It becomes shorter

What happens to the ciliary muscles during accommodation to focus on a distant object?

• They contract

• They relax

• They loosen

• They pull tight

What happens to the suspensory ligaments during accommodation to focus on a distant object?

• They contract

• They relax

• They loosen

• They pull tight

What happens to the lens during accommodation to focus on a distant object?

• It becomes thinner

• It becomes thicker

• It becomes longer

• It becomes shorter

Which common eye defect is also known as short-sightedness?

• Myopia

• Hyperopia

• Astigmatism

• Presbyopia