The Human Eye

The function of the human eye is to _______.

• focus light rays to produce images of objects

• capture sound waves and convert them to images

• capture electrical energy and transform it to brain waves

• capture light waves and convert them to mechanical energy

Which part of the eye is labeled A?

• lens

• retina

• cornea

• optic nerve

The ____________ connects the eyes to the brain

• retina

• cornea

• optic nerve

• pupil

What are 2 functions of the iris?

• provides the clearest, most accurate vision possible

• controls the amount of light that goes into the eye

• to provide 65-75% of the eyes ability to focus

• controls the size of the pupil

Which letter shows the lens?

• C

• F

• D

• B

Which structure carries visual information in the form of electrical impulses made by the retina, to the brain?

• lens

• cornea

• optic nerve

• iris

Which structure is an opening that regulates the amount of light that enters the eye?

• iris

• lens

• pupil

• cornea

The retina contains special sensitive cells. The ______ cells help us see colors and details.

• rod

• eyelashes

• cone

• iris

Which image shows normal vision?

• A

• B

• C

• D

Which image shows normal vision?

• A

• B

• C

• D