How do we see? While this seems like a simple question with a seemingly obvious answer, how exactly a photon of light can trigger neural signals in our brains has been eluding biologists for decades.

Scientists have known for more than 200 years that vision begins with a series of chemical reactions when light strikes the retina, but the specific processes have been a mystery. Scientists have shed ...

Osaka, Japan - How our eyes detect and respond to changes in light intensity is determined by specialized cells in the eye called photoreceptors. In addition to converting light into electrical ...

Long before sunglasses came on the scene, animals had evolved ways, such as shutter-like irises, to deal with the large differences in lighting that their eyes encounter. After all, many animals can ...

Neurons in the retina turn on and off rapidly in response to light. With the discovery of mutations in human genes that mediate this quick turn-off, we have the first picture of its importance in ...