Okay, its official - I'm neurotic
His left eye has just a very slight change since the last test and his right eye doesn't appear to have changed at all. The specialist was very pleased and said that if he does go on to develop PRA (as per his optigen results) then it will be a very slow process which is great news. He still has to have his yearly tests which obviously enables us to monitor the situation. So all in all I am a very happy bunny