Circadian vision

Circadian vision

Bay, Cuba (as indicated by the museum specimen). Furthermore, the flies have an extraordinarily long larval development (up to four months) [6,8]. The conquest of land crabs in these flies is a striking case of parallel evolution. That this odd choice of habitat has evolved at all is extraordinary. Land crabs are quite peculiar themselves and that these organisms, with their own precarious exis...

Strange vision: ganglion cells as circadian photoreceptors.

A novel photoreceptor of the mammalian retina has recently been discovered and characterized. The novel cells differ radically from the classical rod and cone photoreceptors. They use a unique photopigment, most probably melanopsin. They have lower sensitivity and spatiotemporal resolution than rods or cones and they seem specialized to encode ambient light intensity. Most surprisingly, they ar...

Vision in Hyphema

The physiology of scotopic vision, contrast vision, color vision, and circadian rhythmicity: can these parameters be influenced by blue-light-filter lenses?

PURPOSE Evaluation of the potential effects of blue-light-filter lenses on sensory and physiologic factors. METHODS Scientific knowledge on circadian rhythm and scotopic vision will be summarized and potential effects of blue-light-filtering lenses on these parameters will be assessed on a theoretical basis. Clinically relevant studies will also be discussed. RESULTS As far as circadian rhy...

Normal vision can compensate for the loss of the circadian clock

Circadian clocks are thought to be essential for timing the daily activity of animals, and consequently increase fitness. This view was recently challenged for clock-less fruit flies and mice that exhibited astonishingly normal activity rhythms under outdoor conditions. Compensatory mechanisms appear to enable even clock mutants to live a normal life in nature. Here, we show that gradual daily ...