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53. A picture is worth a thousand words:
This is an eye with a very visually significant cataract. The human lens has become quite cloudy and opaque, and therefore the pupil looks yellow or grayish instead of black. This cataract is limiting the patient's vision to 20/100. (To see, this patient must stand 20 feet away from objects that 'perfect' eyes can see from 100 feet away.)
This is the other eye of the same patient, which has recently had cataract surgery and insertion of a lens implant. This new man-made lens is crystal clear and therefore the pupil looks jet black, like it should. This lens also has corrected this patient's vision so that she does not require glasses for reading, computer work, or even driving.
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