Our Black Dog recently had a good eye doctor appointment. He has progressive glaucoma, which is why his left eye was removed almost exactly a year ago. His remaining eye is almost completely blind but, due to the Runner's twice daily application of eye drops, its internal pressure has stayed low. Low pressure means that it doesn't hurt so it doesn't need to be removed. That is great news. Just like human patients with glaucoma, R sees his ophthalmologist every few months to monitor the pressure in his eye.
His progressive blindness makes us sad but we are learning that R is very adaptable. Most of the time, you cannot tell that he is almost blind. He can do almost everything that he could do when he had full sight. He definitely doesn't mope about his blindness.
One thing that is noticeable is that he likes the soft light just before sunrise, just after sunset, and on cloudy days. I think that bright sunlight isn't comfortable for his eye.