Special Senses

What does the optic nerve do?

• transmit impulses from retina to brain

• helps the eye focus

• transmits light rays to retina

• absorbs light rays

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

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

• Cornea

• Lens

• Retina

• Pupil

This structure is what makes animals look as though their eyes are glowing at night when light shines into their eyes

• the tapetum

• the iris

• the retina

• the pupil

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

• sclera

• lens

• pupil

• cornea

What part of the eye is this (the muscle that pulls the lens)?

• iris
• sclera
• ciliary body
• cornea

What part of the eye is this (hint: contains the highest concentration of rods and cones)

• choroid
• fovea centralis
• optic nerve
• ciliary body

A clear fluid that helps the cornea keep its rounded shape, found in the anterior chamber

• aqueous humor

• choroid

• cornea

• optic nerve

supplies blood to the eye

• sclera

• retina

• choroid

• pupil

 ________ are light-sensitive cells in the retina that help us see color.

•  Rods 
• Cones 
• Image 
• Bars