My 13 yr old German Shephard/Lab mix died a year ago..
When she was a pup I had to remove one of her eyes. She was as agile or more so than a dog with two eyes. The vet removed hers and sewed it shut. My friends used to call her the one eyed bandit because she stole things from the neighbors and would bring em to the house. Very cool dog you have, I hope to get one just like him in a year or two.
Sorry to hear about your dog Den even though it was a year ago I know it must still hurt as I had to put down my other German Shepherd before I had Thor at 6yrs old and just as smart even stronger than my Thor but getting Thor after 5yrs or so after that bad experience and then with a 5yr old son that almost got attacked by a German Shepherd I decided I needed another one as a pup and trained to show my son they are great dogs.
As far as thor's eye they didn't have to remove it so was glad about that. Most people don't even know he is blind in one eye just that his eye looks different. I keep his dog insurance up to date just encase something goes wrong in his later yrs and he had insurance when he was hit by the car at 1yrs old....total cost's maybe around $5k but insurance paid for about 90% of it and he got the best Vet surgeons in the country IMO to boot.