I don't think it's nerve damage, but I definitely had/have eye problems. I had double-vision to the point that I was afraid to drive b/c there were too many lanes!! I had to drive winking one eye or I couldn't tell what lane I was in.
I still have to wink to see anything real close up (and I'm nearsighted!) but the really bad vision has cleared up since I took the Mirena out. The eye doctor didn't find anything when I had my eyes checked either.