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 ...

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 ...

This is a preview. Log in through your library . Abstract Networks of interacting genes are responsible for generating life's complexity and for mediating how organisms respond to their environment.

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 ...

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 ...

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 ...