Types
What Do You Know About Cataracts?
More than half of Americans 80 years and older have cataracts, the National Eye Institute (NEI) says.
1. Most cataracts related to aging are caused by proteins clumping in the lens of the eye.
You didn't answer this question.
You answered
The correct answer is
The clumps of protein cloud the eye's lens. The lens is a clear part of the eye that helps to focus light on the retina, the light-sensitive tissue at the back of the eye. The lens must be clear for the retina to get a sharp image. Cataracts cut the amount of light that can reach the retina, the NEI says. This process is a gradual one. It happens so slowly that people don't notice much change in their vision. The cataract becomes a problem when the cloudy areas grow large enough to blur or dull vision. Cataracts can also develop when the lens slowly changes color, from clear to yellowish-brown. This type of cataract puts a brown tint on the world. That makes it more difficult to see blues and purples.
2. Although most cataracts are related to age, some can develop after an eye injury.
You didn't answer this question.
You answered
The correct answer is
Sometimes the cataract shows up years after the injury, the NEI says. Other causes of cataracts include diabetes, steroid use, surgery for other eye problems, and radiation exposure. Babies can be born with cataracts or develop them in childhood.
3. Smoking is a risk factor for cataracts.
You didn't answer this question.
You answered
The correct answer is
Advancing age is the main risk factor for cataracts. Other risk factors besides smoking include heavy alcohol use, diabetes, poor nutrition, medicines such as corticosteroids, trauma, and prolonged exposure to sunlight.
4. A halo that appears around lights may be a symptom of cataracts.
You didn't answer this question.
You answered
The correct answer is
Lights also may seem too bright. Other symptoms include cloudy or blurry vision, faded colors, difficulty seeing at night, double vision, and a frequent need to change the prescription of your eyeglasses or contact lenses, the NEI says. If you have any of these symptoms, talk with your healthcare provider.
5. Cataracts eventually go away on their own.
You didn't answer this question.
You answered
The correct answer is
Cataracts don't go away on their own. Cataracts don't cause vision problems at first, but over time they grow large enough to affect your sight. This makes driving, reading, or watching TV, the NEI says. When this occurs, talk with your healthcare provider about getting the cataracts removed. Surgery is the only way to treat cataracts. If you have cataracts in both eyes, surgery will be done on each eye separately. You will need to wait at least 4 weeks between procedures. According to the American Academy of Ophthalmology, cataracts are the leading cause of blindness worldwide.
6. The most common type of cataract surgery uses ultrasound to break up the old eye lens before a new lens is inserted.
You didn't answer this question.
You answered
The correct answer is
This procedure is called phacoemulsification, or phaco for short. The surgeon makes a small cut on the side of the cornea. The cornea is the clear, dome-shaped surface that covers the front of the eye. They insert a tiny device that sends out ultrasound waves, the NEI says. The sound waves break up the old lens and the lens is removed by suction. An artificial lens called an intraocular lens (IOL) replaces the old lens. The IOL is made of clear plastic. For people who cannot have an IOL, soft contact lenses or high-magnification eyeglasses are an alternative.
7. Your vision may be blurry for several days after cataract surgery.
You didn't answer this question.
You answered
The correct answer is
This is because the eye needs some time to heal after the surgery. The eye with the new lens also needs time to learn to focus with the other eye, the NEI says. Colors may also seem different after surgery. This is because the old lens may have dulled colors. You may need new eyeglasses or contact lenses after your eye heals. Sometimes problems may develop after surgery. Possible problems include infection, bleeding, inflammation, and double vision. These problems usually can be successfully treated.
8. A healthy diet may help reduce your risk for cataracts.
You didn't answer this question.
You answered
The correct answer is
Foods with antioxidant properties are especially important, the NEI says. These foods include leafy green vegetables and fruits. Another way to help prevent cataracts is to wear sunglasses that protect against ultraviolet radiation and a hat with a brim when you are in sunlight. If you smoke, stop. You should also have a regular eye exam, particularly if you are 60 or older. Your eye doctor will check for cataracts, as well as other eye conditions such as age-related macular degeneration and glaucoma.
Your score was:
Author: Sinovic, Dianna
Online Medical Reviewer: Haupert, Christopher L, MD
Online Medical Reviewer: Novick, Tara BSN MSN
Online Medical Reviewer: Seltman, Wendy MD
Date Last Reviewed: 09/01/2022
© 2000-2026 The StayWell Company, LLC. All rights reserved. This information is not intended as a substitute for professional medical care. Always follow your healthcare professional's instructions.
Related Articles
Read article
Eye Care
How Much Do You Know About Age-Related Macular Degeneration?
Millions of Americans are affected by age-related macular degeneration, a disease that damages the eye's central vision. To learn more about macular degeneration, take this quiz.
Read article
Eye Care
Cosmetic Safety for Contact Lens Wearers
Here is some information and tips for cosmetic safety for contact lens wearers.
Read article
Eye Care
Eye Injury (Black Eye)
Detailed information on ecchymosis or bruising of the eye
Read article
Eye Care
What Is Glaucoma?
Glaucoma is an eye disease that can cause blindness. It often begins when pressure builds up in the eye. If caught early, it can often be controlled. But it often has no symptoms, so you need regular eye exams.
