How far can the naked eye see?
Actually, the question is not really how far the eye can see. The eye can see anything from the visible light spectrum that reaches it, assuming there are no complications with the person’s eye. The question is not how far can the eye see, but how far the light can travel to reach the eye. We can see stars billions of miles away because of the amount of light that they give off. But we wouldn’t be able to see a kitten on a road 2 miles away, even if we had line of sight. Part of this is due to the resolution which our eyes can process, the other part of this is due to the fact that light travels as a wave, and is affected by other light, atmospheric conditions, and many other things. So the light reflected off of the kitten two miles away is not strong enough to actually make it all of the way to our eye with enough resolution to even identify it’s presence. Things such as binoculars refract that light back into focus again as it reaches us, enabling us to see the light once again.
