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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 ]
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 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 ...
An intraocular lens (IOL) is a lens implanted in the eye usually as part of a treatment for cataracts or for correcting other vision problems such as short sightedness and long sightedness; a form of refractive surgery. If the natural lens is left in the eye, the IOL is known as phakic, otherwise it is a pseudophakic lens (or false lens).
As of 2005, the estimated cataract-surgery rate was about 500 operations per million people per year. Progress on gathering information on epidemiology, distribution and impact of cataracts within the African continent has been made, but significant problems and barriers limiting further access to reliable data remain. [11]
IOLs can be used to correct other vision problems, such as toric lenses for correcting astigmatism. [38] IOLs can be classified as monofocal, toric, and multifocal lenses. [39] Ocular anaesthesia has improved since Alfred Einhorn synthesised procaine in 1905, which was used in retrobulbar anaesthesia.