The maximum distance the eye can see is about 5 km, due to the curvature of the earth, which makes it impossible to see an object beyond the horizon.
However, if the earth were not round, the eye could reach a much greater distance, which can be reached if the person is in a tall building or on a high mountain.
- The maximum distance the eye can see depends a lot on the size of what is observed.
- As well as on the light it can emit; In the case of a small object.
- The object’s viewing capacity cannot exceed a few meters.
- However.
- If it emits light on a dark background.
- Such as a lit lamp or candle.
- The eye can reach about 50 km.
In addition to the light factor, the size of this object is also important, which justifies the possibility of observing an airplane in the sky, which can be more than 30 kilometers from the ground, or even the moon, the sun and the stars, even when millions of miles from the ground.
In addition to the size and brightness of observed objects, there are other factors that can impair the ability to see, such as visual barriers or eye health, for example, find out what are the 7 most common vision problems and how to treat them.