Healthy Eyes & Ears

People with full vision gather about ____ percent of their knowledge through their eyes

• 75

• 80

• 85

• 90

The _____________ nerve carries electrical messages to the brain.

• optic nerve

• sclera

• cornea

• retina

The _________ is the white outer covering that protects the eye.

• iris

• lens

• sclera

• cornea

The __________ is the clear part of the eye that lets light in

• iris

• lens

• retina

• cornea

What is the colored part of the eye called?

• iris

• cornea

• sclera

• lens

What is the dark opening in the center of the iris called?

• lens

• pupil

• cornea

• retina

In dim light, does the pupil get larger or smaller?

• larger

• smaller

In bright light, does the pupil become larger or smaller?

• larger

• smaller

Which part of the eye focuses light on the retina?

• pupil

• sclera

• optic nerve

• lens

Which part of the eye is a network of nerves that absorbs light rays as they enter the eye?

• retina

• sclera

• cornea

• optic nerve