Cataract & IOL Surgery Lens in the eye focuses light on the retina. Opacities of the lens are called cataract. Cataract may be present at birth or occur due to injury, but the most common cause is related to age (Senile Cataract) and is the reason for visual disability of the elderly. Sankara Nethralaya offers state-of-the-art small incision surgery with phacoemulsification and implantation of a foldable Intraocular Lens. Nearly 70 cataract surgeries are done at Sankara Nethralaya every day. Cataract surgery in combination with other surgeries like Glaucoma surgery, Corneal transplant, and Vitreoretinal surgeries are also performed in the same sitting.