Vision with cataracts

Vision with cataracts

C025/9024 Rights Managed

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Credit: CORDELIA MOLLOY/SCIENCE PHOTO LIBRARY

Caption: Cataract. Simulated view of a hand with four fingers held up as seen by someone with cataracts. A cataract is a clouding of the lens of the eye. It causes the patient's sight to become blurred and yellowed, and if left untreated can obscure the vision completely. Cataracts can be caused by diabetes or prolonged exposure to ultraviolet light, but also may be due simply to old age. It is treated by surgically removing the cloudy lens and replacing it with a plastic one. For an image showing how this scene would appear to someone with normal vision, see image C025/9030.

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