Why does the shape of the eye lens change?

Answer 1

This adjustment is done by two sets of muscles in the iris: its circular muscles contract to close up the iris, making the pupil smaller - while its radial muscles contract to open up the iris, making the pupil larger.

Answer 2

1. Lens is a concave or convex shaped article made up of any transperent material provided that the material must have a different refrective index than that of the medium in which lens has to be operate.

2. any lens can be assumed to be the combination of fraction of different prisms

3. Light refrects (deviates from its original path) when it passes through a prism because it has to travel diffent path lengths through different parts of the prism.

4. the geometry (and symmetry) of lens finally direct all the rays emerging out of the fractions of prisms assembles in a shape of lense (i.e., lens itself) to focus them on a point (in case of convex lense).

Answer 3

The two primary types of lens are convex lens and concave lens.
Concave lens converge the light at its focal point whereas convex lens diverge light at its focal point. Other types of lenses are also available nowadays.

Answer 4

muscles in the eye change the length and thickness of the retina

Answer 5

The lens in the human eye can be changed in order to see objects clearly at different distances so the light entering the eye can be focused on the retina.

Answer 6

The lens changes so it can focus on what you are seeing. If u are looking at something close your lens gets thinker to get a sharp image.

Answer 7

lens

Answer 8

The Lens