Angel Eyes is a dog food additive that is supposed to eliminate the pigments in the food... which come out in the dog's saliva and tears, causing brown staining. Dry eyes has nothing to do with Angel Eyes. Artificial tears can be applied to her eyes several times a day without harm, and will help with irritation. It is okay to use artificial tears made for people, just put one or two drops in each eye.
I haven't used it but have heard of it. It is for removing tear stains on dogs. Don't put it in the eyes.
Have you actually taken her to a canine opthomologist?