News tagged with eye
Scientists solve mystery of the eye
(PhysOrg.com) -- Scientists have a good overall understanding of human vision: when light enters our eyes, it is focused by the lens and strikes the retina in the back of the eye. The light causes some of ...
Nov 17, 2011 |
4.3 / 5 (64) |
14
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A quantum connection between light and motion
(PhysOrg.com) -- Physicists have demonstrated a system in which light is used to control the motion of an object that is large enough to be seen with the naked eye at the level where quantum mechanics governs ...
Feb 06, 2012 |
4.8 / 5 (25) |
6
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The biology of politics: Liberals roll with the good, conservatives confront the bad
From cable TV news pundits to red-meat speeches in Iowa and New Hampshire, our nation's deep political stereotypes are on full display: Conservatives paint self-indulgent liberals as insufferably absent on urgent national ...
Other Sciences / Social Sciences
Jan 05, 2012 |
4.2 / 5 (16) |
55
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New invisibility cloak hides objects from human view
For the first time, scientists have devised an invisibility cloak material that hides objects from detection using light that is visible to humans. The new device is a leap forward in cloaking materials, according to a report ...
Jul 27, 2011 |
3.7 / 5 (15) |
11
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High-quality white light produced by four-color laser source
(PhysOrg.com) -- The human eye is as comfortable with white light generated by diode lasers as with that produced by increasingly popular light-emitting diodes (LEDs), according to tests conceived at Sandia ...
Oct 26, 2011 |
4.9 / 5 (10) |
19
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‘Eyeborg’ man films vision of future (w/ video)
(PhysOrg.com) -- A Canadian filmmaker whose childhood hero was Lee Majors as a bionic man is making the most out of what he has done to compensate for having lost one eye by becoming Eyeborg Man. Rob Spence, ...
Technology / Hi Tech & Innovation
Aug 30, 2011 |
4.4 / 5 (11) |
5
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New fossils demonstrate that powerful eyes evolved in a twinkling (w/ video)
Palaeontologists have uncovered half-a-billion-year-old fossils demonstrating that primitive animals had excellent vision.
Other Sciences / Archaeology & Fossils
Jun 29, 2011 |
4.6 / 5 (10) |
140
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'Jeopardy!'-winning computer delving into medicine
Some guy in his pajamas, home sick with bronchitis and complaining online about it, could soon be contributing to a digital collection of medical information designed to help speed diagnoses and treatments.
Medicine & Health / Medical research
May 22, 2011 |
5 / 5 (8) |
5
Terminator-style info-vision takes step towards reality
The streaming of real-time information across your field of vision is a step closer to reality with the development of a prototype contact lens that could potentially provide the wearer with hands-free information ...
Nov 21, 2011 |
4.6 / 5 (8) |
13
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Professor proposes challenge to prove whether people can see entangled images
(PhysOrg.com) -- Geraldo Barbosa, professor of electrical engineering and computer science at Northwestern University has posed an interesting challenge. He wonders if the human eye and brain together are ...
Feb 29, 2012 |
4.1 / 5 (9) |
5
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'Bionic eye' implant offers hope to the blind
For a man whose view of the world has slowly faded to black over 30 years, a device that allows him to see flashes of light has enkindled his hope of one day gazing upon his grandson's face.
Medicine & Health / Medical research
Apr 03, 2011 |
5 / 5 (7) |
11
Entomologists discover first instance of intact neurons without nucleus - in fairy wasps
Fairy wasps are really tiny; so tiny, they can barely be seen with the naked eye. They’re so tiny that they’re the smallest organism when shown on a slide alongside an amoeba and a Paramecium. And because of this, ...
Dec 01, 2011 |
5 / 5 (7) |
0
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Jumping spider uses fuzzy eyesight to judge distance
(PhysOrg.com) -- One of the ways in which humans determine distance is by estimating the sharpness of an image—closer objects produce a sharp image, while those further away are out of focus. For us, ...
Jan 27, 2012 |
4.4 / 5 (7) |
12
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UB team's software is set to eyeball liars
(PhysOrg.com) -- A study team at the University of Buffalo, State University of New York, is working on video analysis software to analyze eye movements to spot liars. So far, they say their results show that ...
Technology / Hi Tech & Innovation
Mar 08, 2012 |
3.4 / 5 (9) |
18
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Discovery of 'bioelectric' arteries opens path to heart disease treatment
Bionic eyes and limbs made television's six million dollar man an icon, but new research suggests our existing biological structure already exhibits a valuable electrical property. Scientists have found that ...
Jan 30, 2012 |
4.1 / 5 (7) |
2
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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.
For more information about Eye, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
