News tagged with eye

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

Researchers uncover new forms of blindness

Scientists from the University of Leeds have discovered six new forms of inherited blindness, each one resulting from mutations in a different gene important in eye development and vision.

Apr 08, 2014
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Spike in US poison calls over e-cigarettes (Update)

The number of calls to US poison control centers about accidents with bottles of liquid nicotine for refilling e-cigarettes—many involving children—has spiked in recent years, health authorities said Thursday.

Apr 03, 2014
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Lining up our sights

Neurologists at Ludwig Maximilian University of Munich have studied the role of the vestibular system, which controls balance, in optimizing how we direct our gaze. The results could lead to more effective ...

Mar 24, 2014
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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.

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