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
Scientists rescue visual function in rats using induced pluripotent stem cells
Dec 03, 2009 |
5 / 5 (1) |
0
An international team of scientists has rescued visual function in laboratory rats with eye disease by using cells similar to stem cells. The research shows the potential for stem cell-based therapies to treat ...
Search results for eye
Spitzer Unveils Biggest Milky Way View at Adler Planetarium
Space & Earth / Space Exploration
7 hours ago |
5 / 5 (1) |
1
(PhysOrg.com) -- The world's largest image of our Milky Way galaxy, taken by NASA's Spitzer Space Telescope, went on display this week at the Adler Planetarium in Chicago.
NASA's WISE infrared satellite to reveal new galaxies, stars, asteroids
7 hours ago |
4 / 5 (1) |
2
(PhysOrg.com) -- Data from the satellite, says principal investigator and UCLA professor Edward Wright, will help scientists answer fundamental questions about the history of our solar system, the Milky Way ...
Microsoft Store mirrors popular concept of its rival
7 hours ago |
not rated yet |
0
Blink an eye, and the Microsoft Store could be mistaken for an Apple Store.
Sony signs 3-D video deal for 2010 World Cup
13 hours ago |
5 / 5 (3) |
0
(AP) -- The 2010 World Cup is going 3-D. Sony Corp. said Friday it has signed a deal with FIFA, the international football governing body, to record up to 25 World Cup games in 3-D - a technology that gives ...
Hawaiian hot spot has deep roots
Space & Earth / Earth Sciences
Dec 03, 2009 |
4.9 / 5 (9) |
1
(PhysOrg.com) -- Hawaii may be paradise for vacationers, but for geologists it has long been a puzzle. Plate tectonic theory readily explains the existence of volcanoes at boundaries where plates split apart ...
Stellar family portrait takes imaging technique to new extremes
Dec 03, 2009 |
4.5 / 5 (2) |
1
Noted for harbouring Eta Carinae -- one of the wildest and most massive stars in our galaxy -- the impressive Carina Nebula also houses a handful of massive clusters of young stars. The youngest of these stellar ...
List of search results for eye
