So about a month ago this happened:
I was shooting a low powered (10J / 7.5 ft-lb) and a pellet ricocheted right back at me.
I can still see but there is probably permanent damage causing enough astigmatism that it can't be corrected with glasses unless corrective surgery will be possible.
The doctors said that the wound was 1/10th of a milimeter from penetrating into the eye.
So word to the wise kind of thing.
Be careful, especially with kids. Even "toys" can do severe damage.