It would depend if it was a gradual thing or sudden. Obviosly to become suddenly blind would be very anxiety producing.
I had a friend about 10 years ago, a riding partner that lived down the road from me, who was gradually losing her sight from some sort of macular (sp?) degeneration. She went from mild issues to almost completely blind, between about the age of 39 to 45.
Her husband built her a huge arena for riding her horses with a cable to assist her in getting to and from by holding onto it from the house down to the arena. I would help her catch her horses and tack up and we would ride together.
She had been very independent and trailerd her horses out on wilderness trail rides by herself for years.
Of course, as her vision loss progressed, driving was the first to go.
Sadly, her marriage deteriorated too, and she had to give up her beloved 3 horses and move into an assisted living situation. But..she was a real trooper, learned to read braile, learned to use a cane, but, it was very sad to see her have to give up her passion for horses and riding.
We have lost touch the last number of years, but I still think of her from time to time.
Her ex husband kept her horses at their ranch for years afterwards, and it always made me sad to drive by and see her Arabian mare ” Harmony” standing with the other horses alone in their pasture.
She and that horse had an amazing bond.