Onhealthmeup.com - Cataracts are clarity changing of the natural lens inside the eye that continually degrades visual quality. The natural lens locates behind the iris in the area of the pupil, and this directly invisible to the naked eye unless it becomes really cloudy.
The lens plays an important role in focusing unimpeded light on the retina behind the eye. The retina transforms light to a neurologic signal that the brain interprets as vision.
Type of cataracts
- Subcapsular cataract, turbidity occurs behind the lens. People with diabetes suffer or those taking high doses of steroid drugs have more risk of developing subcapsular cataracts.
- Nuclear cataracts, turbidity that occurs in the middle or central zone lens. Nuclear cataracts are usually related to the aging.
- Cortical cataracts, the turbidity of lens occur on the edge - old or old turbidity to the center.
People who suffering early cataracts just feel that their vision is blurred like a cloudy sight, it will continue, and soon become blurred and even cannot see the object, just only see the light, then when the lens becomes very cloudy eventually can cause blindness. These sequences can occur over long periods of time, many years.
13 Causes of Cataracts You Must Know
The lens inside the eye works in a way similar to a camera lens, even more, complex than that. The lens makes the coming light to be focused on the retina for clear vision. The lens flexibly adjusts the focus of the eye, letting us see things clearly either at close range or at a distance.
Eye lenses consist of water and protein. Proteins inside the lens are arranged in such a way that makes the lens look clear and allow light to pass through smoothly.
However, along with the aging, some proteins can accumulate and start to form colors like clouds (cloudy) on the lens. This called cataract and will become denser from time to time, turbidity, and make the sufferer difficult to see and even blind when not able to see at all.
Today no one knows for sure why the lens of the eye can become murky in the elderly and form cataracts. However, some researchers around the world have identified factors that could be the cause of cataracts or related to the development of cataracts.
In addition to advanced age, here are the risk factors for cataracts include:
- Ultraviolet radiation from sunlight and other sources
- Long-term use of corticosteroid drugs
- Statin drugs used to lower cholesterol
- Eye injury or previous eye inflammation
- Eye surgery before
- Hormone replacement therapy
- Consumption of alcohol is significant
- Severe distress
- Family history has cataracts
Causes of Cataracts In Infants
Cataracts occur not only in the elderly but also in infants or those known as congenital cataracts. This condition is most often caused by a rubella virus infection or German measles that occurs in pregnant women during pregnancy.
One theory of cataract formation is that many cataracts are caused by oxidative changes in the lens of the eye. This is supported by nutrition research that shows fruits and vegetables that high levels of antioxidants can help prevent some types of cataracts.
How to Prevent Cataracts?
Although still controversial and medically unproven yet, cataracts can be prevented, but research shows that certain nutrients and nutritional supplements can reduce the risk of cataracts.
A 10-year study by health professionals shown that high intake of foods high in vitamin E and carotenoid lutein and zeaxanthin from foods or supplements was proven to significantly reduce cataract risk.
Good food sources of vitamin E such as sunflower seeds, almonds, and spinach. Good sources of lutein and zeaxanthin include spinach, kale, and other green leafy vegetables.
Other studies have shown high vitamin include vitamin C and foods consist of omega-3 fatty acids can reduce the risk of cataracts.
Another step also to prevent cataracts that wearing eye shades in the form of sunglasses to block 100 percent of the sun's UV rays when you are outdoor activities.
By achieving some of the causes of cataracts above, hopefully, you able to avoid it, of course, do not miss foods rich in vitamins with high antioxidants.