Now I'm not suggesting that you start wearing safety glasses when fishing but we should all be aware of what can happen. If you Google "Fish hook in eye" you will find that this is more common that one might think. In this particular case a guy managed to hook himself in the lens and a pretty good hook at that.
What can you take away from this story? Safety, safety, safety! Be aware of your cast, obstructions to your cast that may deflect your hook, and buddies or nearby fisherman who may not be paying attention to you. I can't imagine that a fish hook in the eyeball would go down as anything less than one of the worst days of your life....