Your optometrist will get a complete medical history and eye exam, and conduct tests to diagnose cataracts. Those tests may include:
Visual acuity test: The standard eye chart test that measures vision ability at many distances is known as the visual acuity test.
Pupil dilation: A pupil is dilated by an optometrist when it is widened with eye drops to allow a close-up exam of the eye’s retina.

In addition, an eye care professional may recommend other tests be done to learn more about the health and structure of your eye.