What is the lens of the eye and what is its function?
The lens is found in the posterior chamber of the eye. The lens is part of the middle coat of the eye. It is held in place by suspensory ligaments extend that from the ciliary processes on the lens to the ciliary muscles which function to hold the lens in place and cause it to change shape.
The lens, by changing shape, functions to change the focal distance of the eye so that it can focus on objects at various distances, thus allowing a sharp real image of the object of interest to be formed on the retina. This adjustment of the lens is known as accommodation.
Depth of field.
The lens can be replaced by an artificial one when it becomes damaged or cataracts have formed.