How Human Eyes Work

What is the clear front layer of the eye called?

• Retina

• Cornea

• Iris

• Lens

How does the pupil adjust to light intensity?

• By changing the shape of the lens

• By expanding and contracting

• By moving the retina

• By altering the cornea

The iris is made up of muscles that control the size of the ______.

• Retina

• Lens

• Pupil

• Cornea

What is the function of the lens in the eye?

• To give color to the eye

• To bend and focus light

• To produce tears

• To protect the eye

Which part of the eye is responsible for adjusting its size in response to light?

• Cornea

• Lens

• Iris

• Retina

What is the clear, gelatinous substance that fills the back of the eye called?

• Retina

• Vitreous

• Macula

• Optic Nerve

What is the function of photoreceptors in the retina?

• To focus light

• To transform light rays into electrical impulses

• To transmit information to the brain

• To protect the eye.

The light-sensitive layer at the back of the eye is called the ______.

• Vitreous

• Retina

• Macula

• Optic Nerve

The light is focused onto the ______ on the retina.

• Vitreous

• Macula

• Optic Nerve

• Brain

The nerves of the retina travel through the ______ to reach the brain.

• Vitreous

• Macula

• Optic Nerve

• Retina