Cataract surgery is performed to treat cataracts. Cataracts can cause blurry vision and increase the glare from lights. If a cataract makes it difficult for you to carry out your normal activities, your doctor may suggest cataract surgery. When a cataract interferes with the treatment of another eye problem, cataract surgery may be recommended.
https://www.mayoclinic.org/tests-procedures/cataract-surgery/about/pac-20384765