When cataracts start affecting your day to day activities, surgery is often recommended as a treatment option. It is a safe procedure which helps the patient see clearly again. In this video, Dr. Rajesh Sinha, Professor of Ophthalmology in Cornea, Lens and Refractive Surgery from the All Indian Institute of Medical Sciences, New Delhi explains what happens in a cataract surgery and the different types of lenses used during the treatment.