Research
Research is scant and mixed, but weakly positive, for the nutrients lutein and zeaxanthin.
In the early 2000s eye drops containing N-acetylcarnosine have been used by several thousands of cataract patients across the world. The drops are believed to work by reducing oxidation and glycation damage in the lens, particularly reducing crystallin crosslinking. Randomized controlled trials indicate the drops may be especially appropriate for seniors, or others where surgery is not advised.
Read more about this topic: Cataract
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—Peter B. Medawar (1915–1987)
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—Lawrence Kutner (20th century)