Vision loss can result from a number of different conditions, including refractive errors and cataracts. There are 2.2 billion people around the world who live with near or distance vision impairment, ...

Learn about causes of gradual and sudden-onset blurred vision, from eyestrain and refractive errors to cataracts and strokes, ...

Visual distortions can cause blurry or wavy vision and have different causes. Some visual distortions are emergencies, especially with sudden vision changes or severe symptoms. Age-related macular ...

Humans develop sharp vision during early fetal development thanks to an interplay between a vitamin A derivative and thyroid hormones in the retina, Johns Hopkins University scientists have found.

One of the biggest mysteries of evolution is how species first developed complex vision. Jellyfish are helping scientists solve this puzzle, as the group has independently evolved eyes at least nine ...