What is a Cataract?

The lens of the human eye is similar in operation to the lens of a camera. Located directly behind the pupil, its function is to focus incoming light rays onto the retina at the back of the eye. Images are transmitted to the brain as electrical impulses via the retina and the optic nerve. When the lens of the eye become cloudy or opaque, light is unable to pass through it and vision is blurred. This condition is known as a cataract.