PBS Unit 2.1.3-2.14

What does the optic nerve do?

• transmit impulses from retina to brain

• helps the eye focus

• receives light and sends it to brain

• transmits light rays to retina

Tags

NGSS.MS-LS1-8

What does the iris do?

• transmits light rays to retina

• helps the eye focus

• sends messages to the brain

• a muscle that regulates how much light enters the eye

What does the sclera do?

• protects the eye

• helps the eye focus

• allows light to enter eye

• transmits light rays to retina

This structure is the back of the eye and it sends images to the optic nerve.

• Cornea

• Lens

• Retina

• Pupil

Tags

NGSS.MS-LS1-8

The hole in the iris gets bigger and smaller because

• the iris is a muscle that moves to make the pupil larger/smaller

• the pupil can adjust itself to the amount of light coming in

• the pupil is a muscle that controls the size of the iris

Tags

NGSS.MS-LS1-8

The thick, tough, white outer covering of the eyeball is called the __________________.

• sclera

• lens

• pupil

• cornea

What part of the eye is the colored, muscular portion of the eye which controls pupil size?

• iris
• lens
• choroid
• ciliary body

What part of the eye focuses light on the retina?

• lens
• retina
• pupil
• ciliary body

Type of photoreceptor that is active in bright light and perceives color?

• fovea centralis
• cones
• rods
• optic disk

What part of the eye is a clear protective structure that allows light to enter the eye?

• iris
• retina
• cornea
• choroid