The doctor will use a bright light to see whether your lenses are clear and to check for other problems in the back of your eyes. Only a few people need these tests. Initially the cataract changes the focusing power of the eye, and a change of glasses can satisfactorily improve vision. Gradually, clarity drops so that visual tasks become increasingly difficult, despite the best possible glasses. A person with cataract views the world as if through a dirty window or a windshield that needs defrosting.
Glare becomes a serious problem.
Color perception becomes muted. Reading, driving, computer work, hobbies, and athletics become less easy and eventually impossible due to diminished vision. These cataracts may not affect vision. If they do, they may need to be removed. Also, cataracts are sometimes linked to steroid use.