
Caroline, you will cope with this. I had a Toy Poodle back in the 70's, and I now know that the breeder had a PRA problem in her breeding dogs. My boys sight was going before he was 3 years old. One eye had to be removed, and the other eye just gradually lost all sight. I left his face hair quite curly over the removed eye, and people didn't notice it was missing. Visitors would say that he couldn't possibly be blind, the way he confidently jumped up on the settee with no hesitation.
He would race up the stairs, do a swift turn at the banisters on the landing, race into my bedroom and jump on the bed. I just never moved the bed. He was used to my little 40ft garden, and did just fine. I moved house when he was nearly 12, and my old neighbour said how cruel I was to take him out of an environment that he was safe and happy with. On the day I moved, he was put into a 200ft garden, and walked close to the fence to get his bearings. He settled in just fine.
When walking him in town on a lead, I used "care full", as two seperate words, when we came to a step or curb. He slowed up to sniff before stepping up, and never tripped, as he was used to being warned about obstacles. I would take him out into fields, and let him run free. I always ran with him, and talked to him all the time, so that he would stay close to me. He learned to trust that I wouldn't allow him to run into anything.
The bond we built was so strong, and we were so close, that I was inconsolable when I lost him at 13. But I would never hesitate at keeping a blind dog again.