Ticklytiger12, T is a very stoic mare so many of the tests you can do at home were not really helpful. It took the vet examing her eyes to determine the issues, which where inpart due to old age and to an injury in one eye (that I did see of course) and off we went into the frustrating world of uveitis aka moonblindness. The vision issues she displayed were also due to macular degeneration, though I wonder if in fact it isn't cataracts. Hmmmmmmmmmmmm just thinking out loud.
I guess what I'm trying to say while I'm going around the barn
is don't be surprised if this horse doesn't react to the cotton ball test or the finger test ect... some horses and T is one that tolerates a lot.