What Is a cataract? A cataract occurs when the natural lens of the eye becomes blurred, often due to aging, high blood sugar, eye injury, certain medicines, or long-term UV exposure. Common symptoms include dim vision, halos near lights, dull colours, frequent power changes, and trouble driving at night. Cataracts https://www.tumblr.com/healpedia/816498608242311168/clear-vision-starts-here-advanced-cataract-eye