User blog comment:IamJakuhoRaikoben/Chapter 503: The Last Sight Seen, Review./@comment-24546844-20160926155558/@comment-7418318-20160926161330

"Hiro don't have the balls to cause any permanent injury on his characters."

Gouging out of eyes isn't permanent injury in Fairy Tail. Porly will just give you artificial replacements that let you see just as well as real eyes, but with the added benefits of resistance or even outright immunity against certain visual kinds of magic.

I don't think it was a one-shot though. Dimaria has burns and some scratches. Unless the fireball or whatever that hit her also caused debris to fly around and scratch Dimaria up, there must have been at least two attacks... if that's any consolation. :P