Thanks Issabellasmum, my vets have been great but it's nice to talk to people who have been through it. I'm still trying to get used to it, Sam is doing well but I've noticed he's starting to bump into things over the last couple of days and I can see his eyes have clouded slightly now. He's ok as long as he knows where he is but he wont go far from me. He's always been the typical nutty collie but it seems he has no confidence now. We're back at the vets on Wednesday, so will see what they say about that. Adjusting the times worked ok yesterday, I just worry that I'm putting him at risk by doing it. On the plus side I've found a brilliant app that lets me set up an ipad to iphone live camera so that I can keep an eye on him when I'm not at home, I'm hoping it will stop me worrying so much, fingers crossed we'll be sorted soon