What are cataracts?
A cataract is a clouding of the eye’s natural lens, which lies behind the iris and the pupil. The lens works much like a camera lens, focusing light onto the retina at the back of the eye. The lens also adjusts the eye’s focus, letting us see things clearly both up close and far away.
The lens is mostly made of water and protein. The protein is arranged in a precise way that keeps the lens clear and allows light to pass through it. But as we age, some of the protein may clump together and start to cloud a small area of the lens. This is a cataract, and over time, it may grow larger and cloud more of the lens, making it harder to see.
Most cataracts occur gradually as we age and don’t become bothersome until after age 55. However, cataracts can also be present at birth (congenital cataracts) or occur at any age as the result of an injury to the eye (traumatic cataracts). Cataracts can also be caused by diseases such as diabetes or can occur as the result of long-term use of certain medications, such as steroids.
A cataract starts out small, and at first has little effect on your vision. You may notice that your vision is blurred a little, like looking through a cloudy piece of glass or viewing an impressionist painting. However, as cataracts worsen, you are likely to notice some or all of these problems:
- Blurred vision that cannot be corrected with a change in your glasses prescription.
- Ghost images or double vision in one or both eyes.
- Glare from sunlight and artificial light, including oncoming headlights when driving at night.
- Colors appear faded and less vibrant.
Though there is significant controversy about whether cataracts can be prevented, a number of studies suggest certain nutrients and nutritional supplements may reduce your risk of cataracts.
One large, 10-year study of female health professionals found that higher dietary intakes of vitamin E and the carotenoids lutein and zeaxanthin from food and supplements were associated with significantly decreased risks of cataract.
Good food sources of vitamin E include sunflower seeds, almonds and spinach. Good sources of lutein and zeaxanthin include spinach, kale and other green, leafy vegetables.
Other studies have shown antioxidant vitamins such as vitamin C and foods containing omega-3 fatty acids may reduce cataract risk.
Visit our Nutrition & Eyes section to read more about eye vitamins and how a healthful diet and good nutrition may help prevent cataracts.
Another step you can take to reduce your risk of cataracts is to wear protective sunglasses that block 100 percent of the sun’s UV rays when you are outdoors.
(This information brought to you by www.thinkaboutyoureyes.com)