The visual phototransduction cascade begins with a cis–trans photoisomerization of a retinylidene chromophore associated with the visual pigments of rod and cone photoreceptors. Visual opsins release ...

Daylight vision relies on high sensitivity to subtle changes in the spatial pattern, contrast and chromaticity of light inputs. Noise in the responses of cone photoreceptors places a fundamental limit ...

Molecular mechanisms of verebrate photoreceptor light adaptation. The human visual system can discriminate increment and decrement light stimuli over a wide range of ambient illumination; from ...

Human skin is constantly exposed to solar ultraviolet radiation (UVR), the most prevalent environmental carcinogen. Humans have the unique ability among mammals to respond to UVR by increasing their ...

What good is half an eye? Evolutionary biologists studying the origins of vision get that question a lot, and new research points to a possible answer. New findings indicate that, even in the absence ...

The concept of retinal implants evokes fantastical concepts such as Deus Ex-like heads-up displays. Before we get there, though, we’d like to be able to give sight to those who are blind or losing ...

Adults with a genetic form of childhood-onset blindness experienced striking recoveries of night vision within days of receiving an experimental gene therapy. Adults with a genetic form of ...