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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Solar-panel-like retinal prosthesis could better restore sight to blind
(Phys.org) -- Using tiny solar-panel-like cells surgically placed underneath the retina, scientists at the Stanford University School of Medicine have devised a system that may someday restore sight to people ...
May 13, 2012 |
5 / 5 (3) |
2
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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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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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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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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) |
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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) |
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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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Can a machine tell when you're lying? Research suggests the answer is 'yes'
Inspired by the work of psychologists who study the human face for clues that someone is telling a high-stakes lie, UB computer scientists are exploring whether machines can also read the visual cues that give away deceit.
Technology / Computer Sciences
Mar 26, 2012 |
3.5 / 5 (4) |
14
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Basketball-sized eyes help squids play defense
Giant and colossal squids have eyes as big as basketballs, and a Duke scientist thinks he knows why.
Mar 15, 2012 |
3.7 / 5 (6) |
3
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Deadly bird parasite evolves at exceptionally fast rate
A new study of a devastating bird disease that spread from poultry to house finches in the mid-1990s reveals that the bacteria responsible for the disease evolves at an exceptionally fast rate. What's more, ...
Feb 09, 2012 |
5 / 5 (2) |
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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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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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LED lights point shoppers in the right direction
Looking for an item in a large department store or mall can be like searching for a needle in a haystack, but that could change thanks to a hybrid location-identification system that uses radio frequency transmitters and ...
Jan 26, 2012 |
2 / 5 (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.
