If it has been 4 or 5 days since the skin started coming off, and only the head has shed, then the snake definitely needs help. Probably your humidity is too low. Read the second sticky to find out how to get this stuck shed off.

Let me try to explain the eyecaps again. If you get a piece of shed skin from a snake, you can clearly see each scale. The eyecap is really just a special clear scale that goes over the eye. When you look at a piece of shed skin from the head of the snake, you can tell where the eyecaps should be. If the skin is one solid piece, that is good. If there are holes where the eyecaps should be, that is bad.

Either way, the soaking and such to get the rest of the skin off might get off the eyecap if it is still stuck. Also, I've read that lots of times a single layer of stuck eyecap isn't much of a problem and will come off with the next shed, as long as humidity and such is good for the snake to get a good shed next time.