Why would not an eye shaped like a cube do for us?—"It would not look well; it could not be rolled about."
Why would not an eye shaped like a cone or cylinder do for us?—"It could not be rolled in every direction."
Why is the ball-shape best for the eye?—"It looks best, and may be rolled in every direction."
What part of the eye do we see through?—"The black spot in the centre."
What is it called?—"The pupil."
What shape is the pupil?—"Round like a circle."
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."