The other night I was watching a campfire and the infrared light from it was intense enough that it warmed my face quite a bit, almost uncomfortably. I must have been receiving quite a bit of invisible light in my eyes, but there was no damage (and I've never heard any warning about watching campfires being dangerous to eyes). On the other hand, light from the Sun would not warm my skin as much as the fire did, yet looking directly at the Sun would damage my eyes. Also, I know that infrared lasers can be quite an eye hazard because your eyes don't respond to limit the light at all. This leads me to believe the following conclusions: A. Infrared light can damage your eyes. B. The intensity of light received from a campfire can be higher than from the Sun. C. Even if there is more intense light from a campfire, it is safer than light from the Sun. Why isn't light from a campfire a danger to your eyes?