Related topics: blood vessels , blindness
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
Researchers discover new 'golden ratios' for female facial beauty
Medicine & Health / Psychology & Psychiatry
Dec 16, 2009 |
4.4 / 5 (20) |
11
(PhysOrg.com) -- Beauty is not only in the eye of the beholder but also in the relationship of the eyes and mouth of the beholden. The distance between a woman's eyes and the distance between her eyes and ...
Small Fingers More Touch Sensitive
Medicine & Health / Neuroscience
Dec 16, 2009 |
4.7 / 5 (3) |
0
When it comes to finger sensitivity, bigger isn't always better.
Search results for eye
Steroid injections may slow diabetes-related eye disease
Dec 15, 2009 |
not rated yet |
0
Injecting the corticosteroid triamcinolone into the eye may slow the progression of diabetic retinopathy, a complication of diabetes that can cause vision loss and blindness, according to a report in the December issue of ...
Sorter Detects and Removes Damaged Popcorn Kernels
Dec 16, 2009 |
4.5 / 5 (2) |
1
(PhysOrg.com) -- A device developed by an Agricultural Research Service (ARS) scientist to sort wheat has been successfully used to detect and remove popcorn kernels that have been damaged by fungi.
Minimally invasive surgery removes sinus tumor without facial disfiguration
Dec 14, 2009 |
not rated yet |
0
Only about one in 2,000 people in the United States get a sinus tumor, but Johnnie Wilcox was one of the unfortunate few.
Final Blu-ray 3D Specification Announced
Dec 17, 2009 |
4.5 / 5 (2) |
0
The Blu-ray Disc Association (BDA) today announced the finalization and release of the "Blu-ray 3DTM" specification. The specification, which represents the work of the leading Hollywood studios and consumer electronic and ...
Device connected to tongue designed to help blind perceive images
Dec 15, 2009 |
4.6 / 5 (5) |
0
An experimental device that uses the tongue instead of the eyes to "see" could be on the market next year, and a blind Fresno, Calif., teen hopes to be among the first to take one home.
S.Korea's LG aims to sell 400,000 3D TVs next year
Dec 15, 2009 |
not rated yet |
0
South Korea's LG Electronics announced Tuesday it plans to sell 400,000 three-dimensional televisions next year by teaming up with local digital satellite broadcaster SkyLife.
Myopia appears to have become more common
Dec 14, 2009 |
4 / 5 (2) |
1
Myopia (nearsightedness) may have been more common in Americans from 1999 to 2004 than it was 30 years ago, according to a report in the December issue of Archives of Ophthalmology.
Scientists crack mystery of protein's dual function
Dec 13, 2009 |
5 / 5 (5) |
0
Researchers at The Scripps Research Institute have solved a 10-year-old mystery of how a single protein from an ancient family of enzymes can have two completely distinct roles in the body. In addition to providing guidance ...
New planet discoveries suggest low-mass planets are common around nearby stars (w/ Video)
Dec 14, 2009 |
4.8 / 5 (18) |
14
(PhysOrg.com) -- An international team of planet hunters has discovered as many as six low-mass planets around two nearby Sun-like stars, including two "super-Earths" with masses 5 and 7.5 times the mass of ...
Biologist Shows Female Birds of a Feather Compete Together
Dec 15, 2009 |
5 / 5 (2) |
0
(PhysOrg.com) -- With its flamboyantly decorated plumage, the peacock is a classic example of how males among many bird species are more visually eye-catching than their female partners. But new research, ...
List of search results for eye
