And during World War II, what he would see would be pilots coming back from their missions, and he noticed that within their eyes they had shards of small bits of material lodged within the eye, but the very interesting thing about it was that material, actually, wasn't causing any inflammatory response.
— Durante a 2ª Guerra Mundial, reparou que os pilotos que regressavam  das suas missões, tinham pequenas lascas alojadas nos olhos. Mas o mais interessante é que o material não causava  nenhuma inflamação.