Eye
hideEyes 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.
News tagged with eye
Physicists Explain How Human Eyes Can Detect Quantum Effects
Sep 29, 2009 |
4.2 / 5 (46) |
19
(PhysOrg.com) -- By greatly amplifying one photon from an entangled photon pair, physicists have theoretically shown that human eyes can be used as detectors to observe quantum effects. Usually, detecting ...
Stretchable silicon camera next step to artificial retina
Aug 06, 2008 |
4.8 / 5 (38) |
4
(PhysOrg.com) -- By combining stretchable optoelectronics and biologically inspired design, scientists have created a remarkable imaging device, with a layout based on the human eye.
Two Retinal Imaging Display Devices at Prototype Stage
Electronics / Consumer & Gadgets
Oct 30, 2009 |
4.9 / 5 (28) |
9
(PhysOrg.com) -- NEC and Brother are both developing wearable prototype devices that use Retinal Imaging Display (RID) technology to project images directly on the wearer's retina. NEC's gadget is designed ...
Dreams may have an important physiological function
Medicine & Health / Neuroscience
Nov 12, 2009 |
3.9 / 5 (27) |
12
(PhysOrg.com) -- Dreams have long been assumed to have psychological functions such as consolidating emotional memories and processing experiences or problems, but according to a Harvard psychiatrist and sleep ...
Stimulating sight: New retinal implant developed
Sep 23, 2009 |
4.9 / 5 (19) |
2
(PhysOrg.com) -- Inspired by the success of cochlear implants that can restore hearing to some deaf people, researchers at MIT are working on a retinal implant that could one day help blind people regain a ...
Cosmic eye sheds light on early galaxy formation
Oct 08, 2008 |
4.4 / 5 (17) |
7
A Cosmic Eye has given scientists a unique insight into galaxy formation in the very early Universe. Using gravity from a foreground galaxy as a zoom lens the team was able to see a young star-forming galaxy ...
New technique that scrambles light may lead to sharper images, wider views
Apr 21, 2009 |
4.4 / 5 (15) |
3
When photographers zoom in on an object to see it better, they lose the wide-angle perspective -- they are forced to trade off "big picture" context for detail. But now an imaging method developed by Princeton ...
Blindsight: How brain sees what you do not see
Oct 14, 2008 |
4.6 / 5 (14) |
3
Blindsight is a phenomenon in which patients with damage in the primary visual cortex of the brain can tell where an object is although they claim they cannot see it. A research team led by Prof. Tadashi Isa and Dr. Masatoshi ...
KDDI's First 3D Mobile Phone LCD Screen
Electronics / Consumer & Gadgets
Oct 09, 2008 |
4.3 / 5 (14) |
3
KDDI Corporation has released a prototype of the world's first 3D LCD display, designed for mobile phones.
Study: Tanning beds definitely cause cancer
Jul 28, 2009 |
4.7 / 5 (12) |
9
(AP) -- International cancer experts have moved tanning beds and ultraviolet radiation into the top cancer risk category, deeming both to be as deadly as arsenic and mustard gas. For years, scientists have ...
Monitoring water through a snake's eyes
May 12, 2009 |
4.3 / 5 (12) |
0
Although most Americans take the safety of their drinking water for granted, that ordinary tap water could become deadly within minutes, says Prof. Abraham Katzir of Tel Aviv University's School of Physics ...
Facial expressions show language barriers too
Medicine & Health / Psychology & Psychiatry
Aug 13, 2009 |
4.5 / 5 (11) |
8
(PhysOrg.com) -- People from East Asia tend to have a tougher time than those from European countries telling the difference between a face that looks fearful versus surprised, disgusted versus angry, and ...
Interactive Data Eyeglasses
Jun 02, 2009 |
4.5 / 5 (11) |
8
(PhysOrg.com) -- The data eyeglasses can read from the engineer's eyes which details he needs to see on the building plans. A CMOS chip with an eye tracker in the microdisplay makes this possible. The eyeglasses ...
Barrow scientists solve 200-year-old scientific debate involving visual illusions
Nov 20, 2008 |
4 / 5 (12) |
0
Neuroscientists at Barrow Neurological Institute at St. Joseph's Hospital and Medical Center have discovered a direct link between eye motions and the perception of illusory motion that solves a 200-year-old debate.
Researchers discover mechanism that helps humans see in bright and low light
Medicine & Health / Neuroscience
Oct 13, 2009 |
4.9 / 5 (9) |
0
Ever wonder how your eyes adjust during a blackout? When we go from light to near total darkness, cells in the retina must quickly adjust. Vision scientists at Washington University School of Medicine in St. ...
