Fourth Nerve Palsy?

The fourth cranial nerve is called the trochlear nerve, it only does one thing, controling a tiny muscle called the superior oblique. The eye can move around because of 6 muscles inside the orbit that all oppose each other. The main motion caused by the superior oblique is medial rotation, so when it doesn't work, the eye rotates laterally. You probably compensate for that by tilting your head away from the side with the nerve damage. I don't see how they would fix this surgically except to hurt the other muscles so there is nothing to compensate for.