The Human Eye

What is the clear front surface of the eyeball called?

• Macula

• Iris

• Pupil

• Cornea

What is the thin circular structure of your eye that has color?

• Macula

• Iris

• Pupil

• Cornea

The iris determines the amount of light that enters the eye.

• True

• False

What is the black hole at the center of your eye called?

• Macula

• Iris

• Pupil

• Cornea

Which part of the eye is just behind the pupil?

• Lens

• Macula

• Nerves

• Iris

What is the job of the lens?

• Let in light

• Focus and defocus

• Keep dust out

• Protect from injury

What is located at the back of the eyeball?

• Cornea

• Iris

• Retina

• Pupil

What is the job of the retina?

• Carrying signals to your brain

• Allowing light into the eye

• Focusing and defocusing

• Converting light into electronic signals

What transfers the signals from your eyeball to your brain?

• Olfactory nerve

• Auditory nerve

• Optic nerve

• Spinal cord

The human eye is composed of how many working parts?

• 17

• 200

• 20,000

• More than 2 million