What color is the pupil?--"Black."

Of what use is the pupil?--"To let light into the eye; to see through."

What is around the pupil?--"A colored ring."

What is the colored ring called?--"The iris."

Of what use is the iris?--"It acts like a curtain to the eye; it lets in
and keeps out light from the pupil."

Of what shape is the iris?--"Round like a ring."

Of what color is the iris?--"Sometimes blue, sometimes brown, sometimes
gray."

Does the iris always appear the same in size?--"It does not: sometimes it
looks large, sometimes small."

When is it the largest?--"When it rolls over the pupil to keep out the
strong light."

When is it the smallest?--"When it rolls backward, to let light into the
pupil."

When is the pupil the largest?--"When we are in the dark."

When is the pupil the smallest?--"When we are in a bright light."

What color is the eyeball?--"White."