We have a 13 year old lab who had developed serious vision problems. She wouldn't even play with the other dogs in the woods on our hikes anymore as she stayed very close so that she could keep sight of her owners. After about a month of using ocluvet, her sight was improved to a degree that she was again able to run in the woods with the other dogs without the fear of losing sight of the pack. It really did change her life.If she was younger we would probably go ahead and get the surgery. But she is nearing the end of her life and we don't want to do invasive surgery at her advanced age. Ocluvet gave her that little bit boost she needed to end her time in relative comfort, and we are thankful for that.