I dunno. I dont usually have that problem. They to color up a little if i'm like hotboxing a small room or something,but that is normally just because the smoke gets in my eyes and kinda drys them out. other then that, yeah, just try not to think about and make sure to keep them cool and have air,if it isnt sandy or dry out. oh, and also, try blinking for a while(more than norml),your eyes are supposed to have a natural "visene" kinda chemical they use to wash your eyeballs.or just close your eyes and say..um...you're tired?...whatever....