• Thomas Kohnen, Martin Baumeister, Daniel Kook, Oliver K Klaproth, and Christian Ohrloff.
• Klinik für Augenheilkunde, Goethe-Universität, Frankfurt am Main. kohnen@em.uni-frankfurt.de
• Dtsch Arztebl Int. 2009 Oct 1; 106 (43): 695-702.

BackgroundCataract surgery, the most frequently performed operative procedure worldwide, typically concludes with the implantation of an artificial intraocular lens (IOL) to correct aphakia (absence of the crystalline lens).MethodSelective literature review including current regulations, guidelines and recommendations for cataract surgery.ResultsThe main symptom of cataract is loss of visual acuity, which usually progresses slowly. It can arise in one eye or both. There is a basic distinction between congenital and acquired cataracts. The probability of developing a cataract rises with age because of biochemical aging processes. The development of a cataract becomes highly likely from the sixth decade of life onward.ConclusionsAs no effective medications for cataract are available at present, its current standard treatment is the removal of the clouded lens. In industrialized countries, this is usually done with ultrasound (phacoemulsification), followed by the implantation of an IOL.

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