• Medical Author:
    Andrew A. Dahl, MD, FACS

    Andrew A. Dahl, MD, is a board-certified ophthalmologist. Dr. Dahl's educational background includes a BA with Honors and Distinction from Wesleyan University, Middletown, CT, and an MD from Cornell University, where he was selected for Alpha Omega Alpha, the national medical honor society. He had an internal medical internship at the New York Hospital/Cornell Medical Center.

  • Medical Editor: William C. Shiel Jr., MD, FACP, FACR
    William C. Shiel Jr., MD, FACP, FACR

    William C. Shiel Jr., MD, FACP, FACR

    Dr. Shiel received a Bachelor of Science degree with honors from the University of Notre Dame. There he was involved in research in radiation biology and received the Huisking Scholarship. After graduating from St. Louis University School of Medicine, he completed his Internal Medicine residency and Rheumatology fellowship at the University of California, Irvine. He is board-certified in Internal Medicine and Rheumatology.

Cataracts Pictures Slideshow

Quick GuideCataracts Causes, Symptoms, Vision Tests and Surgery

Cataracts Causes, Symptoms, Vision Tests and Surgery

What is the prognosis of cataracts?

The rate of progression of cataracts is usually predictable and surgery is successful in restoring vision in a large majority of cases. If other diseases are present within the eye, the degree of visual improvement will be limited by the other disease process. Ophthalmologists can usually determine this in advance.

Can cataracts be prevented?

Everyone, if they live long enough, will develop cataracts. There is no scientifically proven method that prevents the inevitable. Progression of cataracts can be slowed by avoiding large amounts of ultraviolet light, not smoking, and following a healthy diet. Wearing UV-protection sunglasses when exposed to sunlight can be helpful.

Where can people get more information on cataracts?

National Eye Institute (

Cataract Surgery: A Patient's Guide to Cataract Treatment by Julius Shulman, MD

Medically reviewed by William Baer, MD; Board Certified Ophthalmology


Cataracts InfoCenter. <>.

United States. National Eye Institute. National Institutes of Health. "Facts About Cataract." Feb. 2010. <>.

Medically Reviewed by a Doctor on 2/18/2015

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