Dr. Rohit Varma is a unique ophthalmologist and optometrist who provides services ranging from regular eye tests to medical and surgical treatment of complex eye problems. As Dr. Rohit Varma said A cataract is a clouding of the crystalline lens that causes vision loss. A normal lens in the eye focuses light on the retina. We may take a number of steps to prevent cataracts on our own, including the following: Control your diet, avoid smoking and alcohol, and manage your health problems. Sunglasses aren't just a fashion statement, they're a must for good eye health.