Abstract: The percentage of blindness in today’s world above the age of 65 is 78% out of which more than 55% of people are blind because they are suffering from cataract. The lens in the human eye enables one to see. It is made up of water and some proteins. It is normally transparent. But when a person is suffering from cataract, the lens losses its transparency and is formed when the protein clumps together and clouds the lens due to which the lens loses its transparency and the person is not able to see as the light cannot reach the eye. Cataract is the leading cause of blindness all over the world especially in senior citizens. Its initial symptoms are watering of eyes, blurred view, white spot can be seen in the eye.

Keywords: cataract, immature, mature, hypermature.