Cataracts
What is Cataracts?
Cataracts are a clouding of the lens inside your eye. The lens is normally clear and helps focus light onto your retina. When a cataract forms, the lens becomes cloudy or milky. This blocks light from passing through clearly, making your vision blurry or dim.
Cataracts are very common as people age. In fact, more than half of Americans over age 80 have cataracts or have had cataract surgery. While they develop slowly over time, cataracts can eventually interfere with daily activities like reading and driving. The good news is that cataracts are treatable with surgery when they affect your quality of life.
Your nutritional status plays a role in eye health. Certain vitamins and antioxidants help protect the lens from damage. Poor nutrition over many years can increase your risk of developing cataracts earlier in life.
Symptoms
- Blurry or cloudy vision
- Colors appear faded or yellowed
- Difficulty seeing at night or in low light
- Increased sensitivity to glare from headlights or sunlight
- Seeing halos around lights
- Double vision in one eye
- Need for brighter light when reading
- Frequent changes in eyeglass or contact lens prescription
Cataracts develop slowly over months or years. Many people do not notice symptoms in the early stages. Vision changes may be so gradual that you adapt without realizing your eyesight has declined.
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Causes and risk factors
Aging is the most common cause of cataracts. The proteins in your eye lens break down and clump together over time. This creates cloudy areas that block light. Other risk factors include smoking, excessive alcohol use, diabetes, high blood pressure, obesity, and prolonged sun exposure without eye protection. Eye injuries, previous eye surgery, and long-term use of corticosteroid medications can also increase your risk.
Nutritional deficiencies may contribute to cataract development. Low levels of certain vitamins, especially B vitamins like riboflavin, are linked to higher cataract risk. Riboflavin helps protect your eyes from oxidative stress, which damages lens proteins. A diet low in antioxidants and essential nutrients can leave your eyes vulnerable to damage over time. Genetics also play a role, and some people are born with cataracts or develop them in childhood.
How it's diagnosed
An eye doctor diagnoses cataracts through a comprehensive eye exam. This typically includes a visual acuity test to measure how well you see at different distances. Your doctor will dilate your pupils with eye drops to examine the lens and retina. Using a special microscope called a slit lamp, they can see clouding in your lens and determine the type and severity of cataracts.
Blood tests can help identify nutritional deficiencies that may contribute to eye health problems. Checking vitamin B2 levels can reveal if you have low riboflavin, which is associated with increased cataract risk. Talk to a doctor about testing if you are concerned about your nutritional status and eye health. While blood work does not diagnose cataracts, it can help you address underlying factors that affect your vision.
Treatment options
- Early stage: Update eyeglass prescription and use brighter lighting for reading
- Use anti-glare sunglasses to reduce light sensitivity outdoors
- Eat a nutrient-rich diet with foods high in vitamins B2, C, and E
- Include leafy greens, eggs, dairy, nuts, and colorful fruits and vegetables
- Quit smoking and limit alcohol consumption
- Manage diabetes and blood sugar levels to slow cataract progression
- Protect your eyes from UV rays with sunglasses that block 100% of UVA and UVB light
- Cataract surgery: The only way to remove cataracts when they interfere with daily life
- Surgery replaces the cloudy lens with a clear artificial lens
- See an ophthalmologist if vision changes affect your ability to drive or work safely
Frequently asked questions
The first signs are usually subtle vision changes like slightly blurred vision or colors appearing less vivid. You may notice increased glare from headlights when driving at night. Many people first realize they have cataracts when they need more frequent changes to their eyeglass prescription.
You cannot completely prevent age-related cataracts, but you can reduce your risk. Protect your eyes from UV rays with sunglasses, eat a diet rich in antioxidants and B vitamins, and avoid smoking. Managing conditions like diabetes and maintaining a healthy weight also help lower your risk.
Cataracts themselves do not cause permanent vision loss. If left untreated for many years, severe cataracts can make surgery more difficult. However, cataract surgery is highly successful and restores vision for most people. The key is to see an eye doctor when vision changes affect your daily activities.
Vitamin B2, also called riboflavin, helps protect your eye lens from oxidative damage. Low levels of riboflavin are associated with a higher risk of developing cataracts. Eating foods rich in B2 like eggs, dairy, lean meats, and leafy greens supports healthy eye function.
Cataract progression varies from person to person. Most age-related cataracts develop slowly over several years. Some people notice minimal changes for a long time, while others experience faster vision decline. Regular eye exams help your doctor monitor changes and recommend treatment when needed.
Cataract surgery is one of the most common and safest surgical procedures. More than 90% of people who have cataract surgery experience improved vision. The procedure typically takes less than 30 minutes and most people return to normal activities within a few days.
Blood tests cannot directly detect cataracts. Only an eye exam by an ophthalmologist or optometrist can diagnose cataracts. However, blood tests can identify nutritional deficiencies like low vitamin B2 that increase your cataract risk. This information helps you take preventive steps to protect your eye health.
Foods rich in antioxidants and vitamins support eye health. Include leafy greens like spinach and kale, eggs, fatty fish, nuts, seeds, and colorful fruits like berries and oranges. Dairy products and fortified cereals provide vitamin B2. A varied diet with these foods gives your eyes the nutrients they need.
Cataracts cannot return after surgery because the natural lens is removed. However, some people develop a condition called posterior capsule opacification years later. This causes clouding of the membrane behind the artificial lens. A quick laser procedure can easily correct this issue in an office visit.
See an eye doctor if you notice vision changes that interfere with daily activities like reading or driving. Schedule regular comprehensive eye exams every one to two years after age 60. If you have diabetes or other risk factors, you may need more frequent exams to catch cataracts early.