THINGS YOU HAVE TO KNOW ABOUT CATARACTSA cataract is a clouding of the eye's natural lens, which lies behind the iris and the pupil. Cataracts are the most common cause of vision loss in people over age 40 and it is the principal cause of blindness in the world. It is an eye disease in which the clear lens of the eye becomes cloudy opaque, causing decrease in vision. A cataract can occur in either or both eyes. It cannot spread from one eye to the other. Although most cataracts are related to aging, there are other types of cataract:
1. Secondary cataract. Cataracts can form after surgery for other eye problems, such as glaucoma. Cataracts also can develop in people who have other health problems, such as diabetes. Cataracts are sometimes linked to steroid use.
2. Traumatic cataract. Cataracts can develop after an eye injury, sometimes years later.
3. Congenital cataract. Some babies are born with cataracts or develop them in childhood, often in both eyes. These cataracts may be so small that they do not affect vision. If they do, the lenses may need to be removed.
4. Radiation cataract. Cataracts can develop after exposure to some types of radiation.
The lens lies behind the iris and the pupil. It works much like a camera lens. It focuses light onto the retina at the back of the eye, where an image is recorded. The lens also adjusts the eye's focus, letting us see things clearly both up close and far away. The lens is made of mostly water and protein. The protein is arranged in a precise way that keeps the lens clear and lets light 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. Over time, the cataract may grow larger and cloud more of the lens, making it harder to see. Researchers suspect that there are several causes of cataract, such as smoking and diabetes. Or, it may be that the protein in the lens just changes from the wear and tear it takes over the years. Here we give you tyhe details of the most common symptoms of a cataract are:
1. Cloudy or blurry vision.
2. Colors seem faded.
3. Glare. Headlights, lamps, or sunlight may appear too bright. A halo may appear around lights.
4. Poor night vision.
5. Double vision or multiple images in one eye. (This symptom may clear as the cataract gets larger.)
6. Frequent prescription changes in your eyeglasses or contact lenses.
7. These symptoms also can be a sign of other eye problems. If you have any of these symptoms, check with your eye care professional.
The symptoms of early cataract may be improved with new eyeglasses, brighter lighting, anti-glare sunglasses, or magnifying lenses. If these measures do not help, surgery is the only effective treatment. Surgery involves removing the cloudy lens and replacing it with an artificial lens.