What is the lens of the eye?

Like a camera lens: Structure inside the eye behind the iris/pupil, the part that bends the light to focus it on the retina or "film, " akin to a camera. The lens is like an m and m candy with a central core and outer shell that is the capsule.

Focusing element: The lens sits behind the iris and is responsible for part of the critical focusing of the eye onto the retina. It is in young people a remarkably clear structure looking almost artificial but as time goes on takes on color and debris and eventually mostly with lose transparency and require removal - cataract surgery.

Crystalline lens: Your eye is a complicated organ system. Inside the front of the eye there is a fluid chamber between the cornea and the colored part of your eye, called the iris. In the center of the iris there is an opening called the pupil and behind that another chamber between the iris and the crystalline lens. The lens is a disc shaped living tissue composed of regularly arranged collagen with a capsule.