Reasons for Cataract
A cataract is the clouding of the lens in your eye which causes blurred or hazy vision. Ageing is one of the most common cause for cataracts other reasons may be eye injuries (Trauma), disease and long term medication of some drugs.
How a Normal Eye Works ?
The human eye functions in much the same way as a camera. Light passes through the lens of the camera and is focused on the film.
Your eye works in a similar, but more complex manner.
Your eye also has a lens. But instead of film, the image forms on the retina, which is at the back of the eye. Normally, the lens is a clear, transparent structure through which light can freely pass and focus on the retina.The retina responds to the image and sends signals to your brain, creating an instant picture, which changes as your view changes.