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A cataract is a cloudy area in the lens of the eye that leads to a decrease in vision of the eye. [1] [7] Cataracts often develop slowly and can affect one or both eyes. [1] Symptoms may include faded colours, blurry or double vision, halos around light, trouble with bright lights, and difficulty seeing at night. [1]
Cataract surgery is the most common application of lens removal surgery, and is usually associated with lens replacement. It is used to remove the natural lens of the eye when it has developed a cataract, a cloudy area in the lens that causes visual impairment. [4] [10] Cataracts usually develop slowly and can affect one or both eyes. [4]
A 2009 study showed that the prevalence of cataract blindness in people 50 years and older ranged from 0.5% in Buenos Aires, to 2.3% in parts of Guatemala. Poor vision due to cataracts ranged from 0.9% in Buenos Aires, to 10.7% in parts of Peru. Cataract-surgical coverage ranged from good in parts of Brazil to poor in Paraguay, Peru, and ...
Eyes: Cataracts can be static or slowly progressive. Macular degeneration is slowly progressive, while retinal detachment is rapidly progressive. Lungs: Emphysema due to alpha-1 antitrypsin deficiency is a slowly progressive pulmonary disease.
Impairment of a person with 20/20 vision usually ends up being about 20/40 or 20/60, but can be better or far worse. [ 7 ] A doctor examining an eye with retinopathy may be able to see no signs at all, or a slight macular edema , which is a sort of blister on or under the macula , an oval colored spot normally visible to an eye doctor on each ...
Plus, eye diseases such as glaucoma, cataracts, and macular degeneration can cause vision problems, according to the National Institute on Aging (NIA). All these factors can put you at greater ...