Now, the box in which the eye is placed is composed of seven bones glued together internally, and covered with skin on the outside, lined with the softest fat, enveloped in a tissue compared with which the finest silk is only canvas, and the cavity is shaped so as exactly to fit the eye, while the brow projects over like a roof of a veranda, to keep off falling dust and rain from injuring it while the lid is open; and the eyebrows, like a thatch sloping outward, conduct the sweat of the brow, by which a man earns his bread, away around the outer cover, that it may not enter the eye and destroy the sight.

If it were preposterous nonsense to say that electricity, or magnetism, or odyle, contrived and made a little bracelet box, how much more absurd to ascribe the making of the cavity of the eye to any such cause.
Let us next look at the shape of the eye.

You observe it is nearly round in its section across, and rather oval in its other direction, and the cavity it lies in is shaped exactly to fit it.

Now there are eyes in the world angular and triangular, and even square; and as you may readily suppose, the creatures which have them can not move them; to compensate for such inconvenience, some of them, as the common fly, have several hundred.

But, unless our heads were as large as sugar hogsheads, we could not be so furnished, and we must either have movable eyes or see only in one direction.