"Watch the water."
Eye worm woman in the news.
https:// www.washingtonpost.com/news/to-your-health/wp/2018/02/12/she-thought-the-weird-sensation-was-a-stray-eyelash-it-was-eye-worms/
Dracunculiasis
"Dracunculiasis is caused by drinking water contaminated by water fleas that host the D. medinensis larvae."
https:// en.wikipedia.org/wiki/Dracunculiasis