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 ...

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 ...

Photophobia is an intolerance or sensitivity to light. It is linked to various eye-related (ophthalmic) conditions and brain and nervous system (neurological) conditions. Despite its name, photophobia ...

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 ...

The eyes are for seeing, but they have other important biological functions, including automatic visual reflexes that go on without awareness. The reflexive system of the human eye also produces a ...

Tired eyes are not always caused by screens. Reduced blinking, dry air, poor sleep, weak vision, posture, and stress all play ...