We can not well imagine all the inconveniences of such an eye to us.

If we could see distinctly at all, we could not see much farther or wider than the breadth of the end of the nerve at once.

Our sight would then be very like that faculty of perceiving colors by the points of the fingers, which some persons are said to possess.

In that case, seeing would only be a nicer kind of groping, and our eyes would be more conveniently fixed on the points of our fingers; or, as with many insects, on the ends of long antennae.

Such a form of eye is precisely suited to the wants of an animal which has not an idea beyond its food, which has no business with any object too large for its mouth, and whose great concern is to stick to a rock and catch whatever animalculae the water floats within the grasp of its feelers.