The human eye works much like a camera. Light enters through the cornea in the front of the eye, which bends these light rays so that they focus on the retina, the layer of nerve cells at the back of the eye. The retina then transmits these images to the brain. The clarity and sharpness of the image on the retina determines how well you can see.

As your eye ages you may notice increased headlight glare when driving at night.

When you are young the various parts of your eye work together in harmony, and your natural lens makes subtle changes in shape, allowing you to switch focus from far to near, effortlessly. This natural process is called "accommodation."

As we age the eye becomes less efficient and your lens is no longer able to make these delicate adjustments and you lose the ability to accommodate. You may also notice that your vision is more dim or blurry, or colors are not as bright or crisp. In most cases these symptoms are the result of your eyes becoming less supple, less flexible and less efficient.