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The term, cataract means clouding or opacification of the crystalline lens of the eye. This crystalline lens that you were born with is normally clear and transparent. This allows to act like the lens on a camera and focuses light rays and images onto the back of the eye. As you age, usually after mid 40's, the proteins in the lens break down and the lens turns cloudy with yellow and white color appearance. Some of symptoms include light sensitivity, glare problem at night, difficulty seeing especially in dim light condition or dark, loss of color perception, cloudy, foggy or filmy vision, and more. In early stage of cataract formation, you need to update prescriptions in the eye glasses but as the cataract matures, the visual outcome with glasses becomes limited. The surgical treatment involves removal of the cloudy lens and replacing the lens with a lens implant. There are several implant options. Mono focal lens which corrects distance vision is what most people know about. In this case, you will have to use reading glasses to assist in near works.  Premium implants offer both distance and near vision correction. It is very important to have a thorough eye exam and to find out which lens implant option would be better for your individual case.