Cataract,Causes,Symptoms,and,T health Cataract - Causes, Symptoms and Treatment
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Cataract is a cloudy or opaque area in the lens of the eye. 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. Most cataracts are related to aging. Cataracts are very common in older people. Cataract can occur in either or both eyes. It cannot spread from one eye to the other. This cataract forms in the nucleus, the center of the lens, and is due to natural aging changes. It cannot spread from one eye to the other.Secondry is cortical cataract, which forms in the lens cortex, gradually extends its spokes from the outside of the lens to the center. Many diabetics develop cortical cataracts.Third is subcapsular cataract begins at the back of the lens. People with diabetes, high farsightedness, retinitis pigmentosa or those taking high doses of steroids may develop a subcapsular cataract. Congenital cataracts can also be caused by infections affecting the mother during pregnancy, such as rubella. They are also associated with metabolic disorders such as galactosemia. Congenital cataracts risk factors include is inherited metabolic diseases, a family history of cataracts, and maternal viral infection during pregnancy. Congenital cataracts may be inherited. The gene for such cataracts is dominant (autosomal dominant inheritance), which means that the defective gene will cause the condition even if only one parent passes it along.Causes of Cataract 1.Injury or trauma.2.Genetic factors (congenital cataracts). 3. Exposure to ultraviolet light.4.Diet high in antioxidants beta-carotene (vitamin A).5.Heavy alcohol consumption.Symptoms of Cataract 1.Cloudy or blurry vision 2.Problems with light, including headlights that seem too bright.3.Faded colors. 4.Poor night vision. 5.Frequent changes in prescription for eyeglasses or contact lenses.Treatment of Cataract The only treatment for cataract is surgery to remove it. Cataract surgery is very successful in restoring vision. In fact, it is the most frequently performed surgery in the United States, with over 1.5 million cataract surgeries done each year. There are 2 types of surgery that can be used to remove lenses that have a cataract First is Extracapsular surgery consists of surgically removing the lens, but leaving the back half of the capsule (the outer covering of the lens) whole. High-frequency sound waves (phacoemulsification) may be used to soften the lens to help removing it through a smaller cut second is Intracapsular surgery involves surgically removing the entire lens, including the capsule.
Cataract,Causes,Symptoms,and,T