Light Entering Eyes

Which of these gives the eye its color?

• lens

• retina

• Iris

• cornea

The pupil ____________

• Focuses light
• is the clear tissue that covers the front of the eye

• is an opening through which light enters the eye

• is a layer of receptor cells

The clear tissue that covers the front of the eye.

• Lens
• Pupil
• Iris
• Cornea

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

When it is dark, the pupil ___.

• dilates to keep light from damaging the eye.

• dilates to allow more light into the eye.

• constricts to allow more light into the eye.

• constricts to keep light from damaging the eye.

If your light source is blocked by an object, what can you see?

• the light source

• the object

• the shadow of the object

• Nothing

Which of these is a light source

• moon

• lamp

• mirror

• camera