My cat, Oliver, has NEVER used a scratching post that I have purchased. He does have a scratching post however... its called the arm of my couch. When he first started scratching it, I tried double sided tape, but he would just work around that and I can't exactly wrap my entire couch in tape...
Are you able to see if any hairs along the eye lid are touching her eye? Is she blinking or squinting a lot? From what I am told, it is rare in cats, but my cat's eye looked similar and it turned out he had entropion in both eyes, where the eyelids start to turn inward and the hairs rub...