"'Jesus H. Roosevelt Christ,' I said. 'What was that?'
'A loa-loa worm,' Geilie said, looking amused at my reaction. 'They live in the eyeballs, just under the lining. They cross back and forth, from one eye to the other, and when they go across the bridge o' the nose, I'm told it's rather painful.' She nodded at the slave, still quivering slightly on his pallet." —Diana Gabaldon, Voyager (NY: Dell, 1994), 959