Eye Structure and Function

Light enters through the...

• cornea

• glands

• iris

• retina

How does an optical illusion occur?

• The brain misinterprets electrical signals from the eyes

• The eyes cannot see correctly

• The brain has two interpretations of the electrical signal from the eyes

• The eyes misinterpret electrical signals from the brain

Which of the following steps in the visual process happens JUST AFTER receptor cells in the eye produce electrical signals in response to light?

• The eye analyzes a series of points

• Nerve cells send signals to the brain

• The brain receives the signals

• The signals are analyzed by the brain

Tags

NGSS.MS-LS1-8

Why does the center of a person's vision appear more clear and colorful than the edges of their vision?

• The center of the eye has more rod cells than the edges

• The center of the brain holds the retina

• The center of the eye has more cone cells than the edges

• The center of the eye is thicker than the edges

The retina is actually an extension of the brain, connected by the optic nerve.

• True

• False

To allow humans to see objects in three dimensions, the ____________ combines the images received by each eye.

• retina

• brain

• optic nerve

• cornea

How does light affect the pupil?

• The pupil gets larger as light decreases

• The pupil gets larger as light increases

• The pupil's color depends on the amount of light

• The pupil isn't affected by light

Which of the following does NOT protect the eyes?

• tears

• retina

• eyelids

• eyelashes