Mammalian Eye

What is the clear, outermost layer of the eye that refracts light?

• lens

• cornea

• pupil

• retina

A thin, translucent layer lining the back of the eye; receives images formed by the lens; connected to the brain by the optic nerve. Contains rods and cones.

• lens

• cornea

• pupil

• retina

This is the colored ring of muscle around the pupil.

• cornea

• lens

• pupil

• iris

In bright light, your pupil will be

• larger
• smaller

This part of the eye carries the message from your eye to the part of your brain that controls vision. 

• cornea
• lens
• optic nerve
• retina

Which parts of your eye are transparent?

• retina and lens

• optic nerve and cornea

• cornea and lens

• iris and cornea

A tiny hole that first allows light to enter the eye.

• pupil

• retina

• lens

• cornea

This back layer of the eye contains photoreceptors that detect color and brightness.

• optic nerve

• retina

• neuron

• cornea

Photo-receptors that detect color are called _________.

• cones

• rods

Which term best describes rods?

• Found on the edges of the retina; detect brightness

• Found in the center of the retina; detect color

• Found in the center of the retina; detect brightness

• Found on the edges of the retina; detect color