Isn’t there a mineral/vitamin deficiency that causes white hair around the eyes? Seems like there was a thread on it a while ago, but can’t remember the missing component in the diet.
If horse was much younger, foal, yearling wearing those marks, I would say she had Appaloosa breeding and was going to grey out on you later. I have seen that be common in some lines of App horses. And yeah, they usually were the MOST spectacularly colored ones. I believe there is photos of a Fresian/App cross foal, gorgeous spotted color, wearing the “spectacles” young, who ended up pretty much snow white as a mature stallion. Had some black spots on his skin, but no black in the hair coat. I think he still a stallion, available for breeding. Looked well handled, but such a change from his foal photos!