Try this: shave your eyebrows and then run 5 miles. Ok by now you should have a significant amount of sweat pouring directly into your eyes, does it hurt? are t

Try this: shave your eyebrows and then run 5 miles. Ok by now you should have a significant amount of sweat pouring directly into your eyes, does it hurt? are they swollen? can you see well enough to throw a spear at a reindeer?