Cataracts are actually quite common. In fact, cataracts are the number one cause of blindness in the world. Nearly one out of every five people ages 65 to 74 has cataracts, and nearly one out of every two people older than 74 has them. The good news is that cataract surgery is a safe option for successfully curing the condition.
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Honor Society of Nursing (STTI) answered
According to the Eye Diseases Prevention Research Group, in 2000 there were an estimated 20.5 million people over 40 in the United States (17.2 percent) with cataracts in either eye, and it was projected that this number would rise to 30.1 million by 2020. This roughly equates to 1 in 6 adults over the age of 40 with a cataract, making them fairly common.
Laura Fine, Ophthalmology, answeredA cataract is a clouding of the normally clear lens of the eye (the lens focuses light rays to the retina, the innermost layer of the eye, where images are captured and recorded). Most people develop some degree of lens opacity by age 60. Cataract occurs in about half of all people ages 65 to 74 and in about 70% of those older. Despite surgical advances, the lack of access to health care in developing countries makes cataract the leading preventable cause of blindness in the world today.