Fergie:
"We are purely guessing what is wrong at the moment, so we will send him to another specialist next week.
"It is an unusual situation because the first one we sent him to is regarded as one of the top specialists in the world. The message we got back then was that the situation should clear up okay but Paul's vision is still blurred, so we are going to seek some clarification on the situation and see if they can diagnose something we can treat.
"It will be good to get a second opinion as it's been a few weeks and we need to find a remedy.
"We are purely guessing what is wrong. It is unusual because the first specialist he saw is regarded as one of the top in the world.
He won't be playing until it is sorted
"Knowing Paul, he would probably go out and play but you cannot take a chance on that."