Cataract

Frequently Asked Questions

8. How is a cataract detected?

Cataract is detected through a comprehensive eye exam that includes a visual acuity test, a dilated eye exam, and tonometry.

The visual acuity test is an eye chart test that measures how well you see at various distances.

In the dilated eye exam, drops are placed in your eyes to widen, or dilate, the pupils. Your eye care professional uses a special magnifying lens to examine your retina and optic nerve for signs of damage and other eye problems. After the exam, your close-up vision may remain blurred for several hours.

In tonometry, an instrument measures the pressure inside the eye. Numbing drops may be applied to your eye for this test.

Your eye care professional also may do other tests to learn more about the structure and health of your eye.