III. The Human Eye — Albinism

Now, the strange thing is that everyone has to admit that, as people say, you can see with the optic nerve everywhere here, except precisely where it enters; there it is blind, you see nothing there! So if someone looks just enough to somehow see out there, or if the nerves around it are diseased and only the spot where the optic nerve enters is healthy, then you still see nothing where the optic nerve enters. Now people say: with the optic nerve you see, it is there for that, that you see. Have you now heard the following? Just imagine: there is a group of workers, let us say thirty workers. Twenty-five of them have to work very hard; they are standing everywhere. And there is a group of five – they won't do it, but I'll assume they do it – these five are allowed to laze around while the others work hard. So we can say: there are the 25 hard-working laborers, and there are five who laze around all the time, sitting on padded chairs and lazing around. If someone were to tell you that the work is being done just as well by the five idlers – or perhaps he can't say that because he doesn't see it, but the work is accomplished by idling – you won't believe it, will you? That is nonsense. But now science teaches us that the optic nerve sees. But precisely at the point where it is most, it sees nothing! It is just as if you were to say: the work is done by what the five loafers are doing. You see, one knows such things—that is precisely the strange thing—one knows such things, but one nevertheless continues to assert quite ordinary nonsense. Isn't it, from the fact that here is the so-called blind spot—that's what it's called—and that you see nothing at all at the point where the optic nerve attaches the most, it is quite clear from this that the optic nerve cannot be what you see with.