If you're suddenly more sensitive to bright light, it could be due to an underlying condition. Migraines, dry eye, corneal scratches, pink eye, and certain medications can cause photophobia. Call an ...

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 ...

Light-sensing proteins are found throughout all domains of life. Even single-celled microbes carry proteins that respond to light. And animals have light-sensitive organs in a huge range of shapes and ...

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 ...