Does her eye seem to be stuck closed and when you soak her it softens whatever is causing it to be stuck so that she can open it? Have you tried flushing her eye out with plain saline solution or just water? Is there any sign of redness or inflammation inside her mouth? Sometimes mouth rot or a respiratory infection can cause swelling and inflammation of the eyes, even if it is minor. Vitamin A deficiency can also cause eye issues--maybe she has some vitamin deficiency if she wasn't getting proper supplementation and gutloaded insects prior to your getting her.