Which part of the eye helps the eye to focus on objects at different distances?

Explanation:

The Lens (also called the Crystalline Lens) is the adjustable focusing element of the eye. It is located just behind the iris. This process of adjusting the focus for different distances by changing the shape of the lens is called accommodation.

It is the second part of the eye which is basically after the cornea. It's called the retina.

It lets us focus on objects and light 25% to 35%.

Hope this helps

Sky

answer is: naturally occurring solid, inorganic compound or element is mineral.

minerals usually have crystalline form, that means than crystal constituents (atoms, molecules or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.

for example magnetite is a mineral of iron oxide (fe₂o₃).

calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (caco₃).

dolomite is an   carbonate mineral composed of calcium magnesium carbonate (camg(co₃)₂).