This happened in 2004.
It should be noted that the 2004 Summer Season was the last season played in which Facemask on Batters Helmets were not required, all the orgs had legislated in 2003 that facemasks were required for 2004 Season, and we had purchased and installed them on all our helmets, but because the ASA and others did not have time to establish a NOCSAE standard they backed things up to 2005, I have always regretted that I allowed all the girls that wanted to remove the facemasks to do so, including my daughter, needless to say after this accident I required the masks be put back on!
Daughter was batting in an 16u ASA NQ at Riverfront West against Illinois Outlaws Righthander Kam Ferguson (Western Illinois), who was clocked by Angie Jacobs from Miami U at the time at 61 earlier in the weekend, she swung at a Riseball, the ball went off the area where a bottle bat reduces and directly into her right eye, she suffered a severe (70%) fracture of the orbital floor and minor fracture of the lower front of the eye socket, along with (the most visible at the time of the accident) a laceration just below the eys socket on her cheek.
There was no question immediately that she had suffered something severe, the life squad arrived and transported her to Cincinnati Childrens Hosptial, and several days later she went through surgery which placed a teflon plate in the eyesocket to replace the orbital floor, at this point I pretty much had decided she was through with fastpitch, according to the Surgeon she was lucky that the she had not lost the eye. She didn't play for 6 months after that and when she did I always was on pins and needles when she would take a blow to the head. She has some lingering issues with the injury but for the most part recovered full vision, with a small cosmetic holdover.
She ended up coming back and playing having her best years after the accident, and to this day I believe it was because she knew she was playing because SHE wanted to play, and maybe more importantly because her dad had come to terms with the idea that he was simply happy to see her on the field, and that if she was simply playing that was good enough, she didn't have to be the best, she just had to do the best she could do!
I have seen others injured both in the mens FP game and in JO FP, but obviously this was the one that hit home for me.
This is why I have always been a strong proponent for safety in the game.