It's official, I'm a grumpy old man

Just in case some of you don't think this is very serious

Decades ago, some then 4wd/ off roading friends had a young daughter who lost an eye. I don't remember the technical details, but they were told it likely was because of pets or animal waste, some worm? I don't remember, gets into your eye socket, and can somehow travel down the optical nerve canal to the brain. That's right. She only has one eye.