The maximum distance that the eye can see is about 5 km, due to the curvature of the earth, making it impossible to see any object beyond the horizon.
However, if the earth were not round, the eye would be able to reach a much greater distance, which can be achieved if the person is in a high building or a high mountain.
What is the maximum distance the vision can reach
The maximum distance that the eye can see depends a lot on the size of what is observed, as well as on the light it may be emitting. If it is a small object, the object's vision capacity may not exceed a few meters, however, if it emits light on a dark background, such as a lamp or a burning candle, the eye can reach almost 50 km away.
In addition to the light factor, the size of this object is also important, which justifies that it is possible to observe an airplane in the sky, which may be more than 30 kilometers from the ground, or even the moon, the sun and the stars, even when millions of kilometers away from the earth.
In addition to the size and luminosity of the objects observed, there are other factors that can alter the ability to see, such as visual obstacles or eye health, for example. See which are the 7 most common vision problems and how to treat them.
