Photophobia is not a fear but a sensitivity to light. Light sensitivity can be caused by eye conditions, brain issues, and certain medications. Seeing bright spots, headaches, and squinting are common ...

Under the right conditions, a human eye can look as if it is filled with tiny stars or shimmering tinsel. That sparkle is not ...

Imagine if a simple beam of light could one day treat conditions like nearsightedness or age-related macular degeneration (AMD). Researchers at the University of Nevada, Reno School of Medicine (UNR ...

A type of light-sensitive cell in one of the visual systems of fruit flies transmits two chemical messengers, histamine and acetylcholine, in response to the same light signal. These two molecules act ...