How do your eyes focus?

Answer 1

There are inner lenses within your eyes that actually move and change in order to focus from short distance to long distance, this is typically involuntary since no one physical thinks about how the eyes focus in order to actually do so. As you get older your lenses take a shape which are suitable for the range of sight you typically use. In some cases a persons lenses will be ill adjusted and require glasses or contacts in order to see better, as a result of short-sightedness, farsightedness, or astigmatism

Answer 2

The lenses in human eyes work quite differently from glass lenses. They can focus by using very small muscles to changing the shape of the lens. This changes the way light passes through and makes the eye focus and see clearly.

Answer 3

On the fovea, which is located in the center of the macula.