Understanding the Human Eye and Vision

What is the function of the conjunctiva in the human eye?

• To protect the eyeball with tough fibres

• To make eye movement and blinking easier

• To connect the retina and brain

• To focus light on the retina

Which part of the eye is responsible for bending 70% of incoming light?

• Sclera

• Lens

• Iris

• Cornea

What is the role of the optic nerve?

• To adjust the pupil size

• To send electrical impulses to the brain

• To detect color and fine details

• To cover the eyeball front

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Which part of the eye contains the light-sensitive receptors?

• Lens

• Retina

• Iris

• Cornea

What is the main function of rods in the retina?

• To adjust the pupil size

• To connect the retina to the brain

• To sense motion and provide peripheral vision

• To detect color

Where are cones concentrated in the retina?

• Sclera

• Fovea

• Optic nerve

• Conjunctiva

What causes color blindness?

• Non-functioning or missing cones

• A damaged optic nerve

• A cloudy lens

• An enlarged pupil

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Which part of the eye is responsible for adjusting the pupil size?

• Cornea

• Lens

• Iris

• Retina

What is the primary role of the lens in the eye?

• To protect the eye

• To sense motion

• To form an image on the retina

• To cover the eyeball front

How does the brain process the image received from the retina?

• It turns the image upside down

• It enlarges the image

• It turns the image the right way up

• It changes the image color

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