You're absolutely right...it could have been the other two remedies that were tried. They were each only given once with no change whatsoever. We really don't know if it was the arnica that helped. And they only noticed about a week ago that the cat was definately seeing. But after the arnica..they did notice that her eyes were responding to light...they didn't notice that after the other two remedies. I don't know what else to say.