The other day, our old boy bumped into a lamp post. His vision is not so good now, as he has cataracts. Along with prodigious eyebrows, as is befitting a dog of his breed and age.
I have a theory that the cataracts diffuse direct sunlight, such that it blurs his vision beyond that which the cataracts do. I once mentioned this to a human who had cataracts (but not prodigious eyebrows) and she bore out my theory.
It’s hard watching his world shrink, but he is still happy, playful, and enjoying life.