Cataracts are a clouding or opacification of the natural internal lens ( the part of the eye responsible for focusing light and producing clear, sharp images) of the eye. They can vary from extremely small areas of cloudiness to large opaque areas that cause noticeable blurring of vision.

Cataracts are usually a result of changes that cause the lens to become cloudy. This may be due to advancing age,may be inherited, or the result of trauma or disease. Other risk factors which can precipitate the onset of cataracts may include excessive exposure to UV radiation found in sunlight, cigarette smoke, systemic diseases like diabetes or certain medications like steroids.
There is no proven method to prevent cataracts from forming. Wearing good quality UV blocking sunglasses as well a diet rich in antioxidants such as, vitamins A,C,E, Zinc, Selenium and Magnesium can also be beneficial.
Since cataracts have a relatively wide range in severity, treatment is surgical and is reserved only when the cataracts have begun to interfere with everyday activities such as reading and driving. Cataract removal with intra-ocular lens insertion is commonly performed with great success to help restore clear vision.