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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. According ...
Cataracts are most commonly due to aging but may also occur due to trauma or radiation exposure, be present from birth, or occur following eye surgery for other problems. [ 1 ] [ 4 ] Risk factors include diabetes , longstanding use of corticosteroid medication, smoking tobacco , prolonged exposure to sunlight , and alcohol . [ 1 ]
Anisometropia is caused by common refractive errors, such as astigmatism, far-sightedness, and myopia, in one eye. [6] Anisometropia is likely the result of both genetic and environmental influences. [7] Some studies suggest, in older adults, developing asymmetric cataracts may cause worsen anisometropia.
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.
Digital-related eye strain is marked by symptoms that can include dry, achy or even painful eyes; blurry vision; burning, stinging or redness; watery eyes or the sensation of having sand or ...
Cataracts most commonly occur due to aging, but may also be caused by trauma or radiation exposure, be present since birth, or may develop as a complication of eye surgery intended to solve other health problems. [4] [11] Cataracts form when clumps of proteins or yellow-brown pigment accumulate in the lens, which reduces transmission of light ...
A similar report suggests that the proteins come from the lens, iris, and other parts of the eye. [3] A report in 2010 found indications of an abnormal ocular surface in PEX patients, discovered by an eye staining method known as rose bengal. [11] Diagram of anterior segment of a human eye (horizontal section of the right eye) 1. Lens, 2.
The general cause of polycoria is unknown, but there are some other eye conditions that are in association with polycoria. These include (although not often) polar cataracts, glaucoma, abnormally long eyelashes, abnormal eye development, and poor vision. [citation needed] There have been cases diagnosed from age 3 to adulthood.