His lens is detached and floating around in his eye! It was pushing up against the front this morning, so its really painful poor thing. Its being take out on thursday and hopefully he will still be long sighted (apparently dont need the lens for that).
He has been having problems for the last 2 months and so there is no chance of saving the lens now. Poor Nat has been so stressed over this and poor B has been up and down to the vets every other week.