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In many countries, surgical services are inadequate, and cataracts remain the leading cause of blindness. [68] Even where surgical services are available, low vision associated with cataracts may still be prevalent as a result of long waits for, and barriers to, surgery, such as cost, lack of information and transportation problems.
Cataracts are the leading cause of child and adult blindness that doubles in prevalence with every ten years after the age of 40. [57] Consequently, today cataracts are more common among adults than in children. [56] That is, people face higher chances of developing cataracts as they age.
At some point—usually as you enter middle age—most people develop this eye condition, which is a clouding of the eye’s lens that can get progressively worse and impair your vision.
Cataracts are the main cause of blindness in Africa, and affect approximately half of the estimated seven million blind people on the continent, a number that is expected to increase with population growth by about 600,000 people per year. As of 2005, the estimated cataract-surgery rate was about 500 operations per million people per year.
Childhood cataract is cataract that occurs at birth or in childhood. [1] It may be congenital or acquired. Congenital cataracts are defined as the presence of lens opacification during childhood. [2] About 1.14 million children in the world are blind. [3] Cataracts are the leading cause of blindness in children. [4]
A normal ocular lens is typically almost completely transparent, but decline in ocular lens transparency contributes to the medical condition known as cataracts. [10] In fact, approximately 95 million humans are affected by cataracts worldwide, which is the leading cause of blindness. [11]
Leading cause of death (2016) (world) The following is a list of the causes of human deaths worldwide for different years arranged by their associated mortality rates. In 2002, there were about 57 million deaths.
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