News tagged with eye

Related topics: brain · nerve cells · current biology · retina

Why arched backs are attractive

Researchers have provided scientific evidence for what lap dancers and those who twerk probably have known all along - men are captivated by the arched back of a woman. A team led by Farid Pazhoohi of the University of Minho ...

Oct 25, 2017
popularity9 comments 0

Better sleep, less fear

Higher quality sleep patterns are associated with reduced activity in brain regions involved in fear learning, according to a study of young adults published in Journal Neuroscience. The results suggest that baseline sleep ...

Oct 23, 2017
popularity43 comments 0

Curve-eye-ture: How to grow artificial corneas

Scientists at Newcastle University, UK, and the University of California have developed a new method to grow curved human corneas improving the quality and transparency - solely by controlling the behaviour of cells in a ...

Oct 19, 2017
popularity72 comments 0

Eye

Eyes are organs that detect light, and send signals along the optic nerve to the visual and other areas of the brain[citation needed]. Complex optical systems with resolving power have come in ten fundamentally different forms, and 96% of animal species possess a complex optical system. Image-resolving eyes are present in cnidaria, molluscs, chordates, annelids and arthropods.

The simplest "eyes", such as those in unicellular organisms, do nothing but detect whether the surroundings are light or dark, which is sufficient for the entrainment of circadian rhythms. From more complex eyes, retinal photosensitive ganglion cells send signals along the retinohypothalamic tract to the suprachiasmatic nuclei to effect circadian adjustment.

This text uses material from Wikipedia, licensed under CC BY-SA

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