Quantcast

Latest Visual system Stories

2013-04-04 15:05:26

Rodents recognize objects using sophisticated perceptive strategies Sight is such a spontaneous activity that we are unaware of the complexity of the brain mechanisms it implies. For instance, we easily recognize objects, which appear to look always the same, without realizing that we observe them from ever-changing points of view and that their image — the luminance profile cast onto the retina —varies significantly each time we look at them. To maintain such "invariance"...

One Step Closer To Understanding The Origins Of Eye Disease
2013-04-04 06:12:35

Jason Pierce, MSN, MBA, RN for redOrbit.com — Your Universe Online Researchers at Lund University in Sweden have published a study describing the use of an innovative process to examine the effect of tension in maintaining retinal tissue. The method allows the retinal tissue to be studied outside the body while simulating the mechanical strain experienced by the tissue in the human body. The authors anticipate that the method will lead to better understanding of the reason for vision...

2013-03-29 23:03:11

A new study finds that the Diopsys NOVA-LX Visual Evoked Potential (VEP) Vision Testing System can help optometrists and ophthalmologists distinguish healthy from glaucomatous eyes, which is especially helpful in the early detection of the disease. Pine Brook, NJ (PRWEB) March 29, 2013 The Diopsys® NOVA-LX Visual Evoked Potential (VEP) Vision Testing System has proven to be an effective tool for glaucoma detection. New research by New York Eye and Ear Infirmary just published in...

Brain's Visual Cortex Activates For Reward Even When Stimulus Is Removed
2013-03-22 12:15:13

Alan McStravick for redOrbit.com - Your Universe Online An international collaborative study, conducted by researchers at both KU Leuven and the Harvard Medical School, has attempted to recreate Ivan Pavlov´s famous experiment, but with a twist. Pavlov, you may know, was famous for conducting a study where a stimulus was introduced and the reward for that stimulus was slowly removed, with the aim of observing whether or not a physiological response would continue to be registered...

2013-03-07 14:49:55

A region of the brain known to play a key role in visual and spatial processing has a parallel function: sorting visual information into categories, according to a new study by researchers at the University of Chicago. Primates are known to have a remarkable ability to place visual stimuli into familiar and meaningful categories, such as fruit or vegetables. They can also direct their spatial attention to different locations in a scene and make spatially-targeted movements, such as...

2013-03-01 12:05:51

Images have been transformed into pixels and projected onto a headset to help the visually impaired in everyday tasks such as navigation, route-planning and object finding. Developed using a video camera and mathematical algorithm, the researchers from the University of Southern California hope the pixels can provide more information and enhance the vision of patients already fitted with retinal implants. Lead author of the paper, James Weiland, said: "Blind people with retinal implants...

Tadpoles Able To See With Eyes Transplanted Onto Their Back
2013-02-28 10:29:13

Brett Smith for redOrbit.com - Your Universe Online In a study that could have implications for organ transplant procedures, two scientists from Tufts University found that eyes placed on the backs of tadpoles were still capable of vision despite having no direct neural connection to the brain. "A primary goal in medicine is to one day be able to restore the function of damaged or missing sensory structures through the use of biological or artificial replacement components,” said...

New Artificial Retina Partially Restores Sight
2013-02-15 10:56:46

Jason Pierce, MSN, MBA, RN for redOrbit.com — Your Universe Online Today the US Food and Drug Administration (FDA) approved an artificial retina that is the first device of its kind to treat a form of progressive blindness that begins in young adulthood. The device will not completely restore vision, but it does allow the wearer to detect differences in light patterns and some shapes from their environment. The Argus II Retinal Prosthesis System, developed by Second Sight Medical...

Sophisticated Primitive Reflexes And Dizziness
2013-02-15 06:13:06

Michael Harper for redOrbit.com — Your Universe Online Our brains are capable of doing some amazing things. Yet, there are some processes which, while sophisticated enough, are mostly thought of as common and basic. For instance: The reflex which allows us to keep our eyes focused on one point while our heads are moving about. This reflex is called the Vestibular-Ocular Reflex (or VOR), and we share it with most vertebrates. For many years, scientists have believed that this...


Latest Visual system Reference Libraries

Eye
2013-04-30 13:41:59

1. vitreous body 2. ora serrata 3. ciliary muscle 4. ciliary zonules 5. canal of Schlemm 6. pupil 7. anterior chamber 8. cornea 9. iris 10. lens cortex 11. lens nucleus 12. ciliary process 13. conjunctiva 14. inferior oblique muscle 15. inferior rectus muscle 16. medial rectus muscle 17. retinal arteries and veins 18. optic disc 19. dura mater 20. central retinal artery 21. central retinal vein 22. optic nerve 23. vorticose vein 24. bulbar sheath 25. macula 26. fovea 27. sclera 28....

More Articles (1 articles) »
Word of the Day
cock-a-hoop
  • Exultant; jubilant; triumphant; on the high horse.
  • Tipsy; slightly intoxicated.
This word may come from the phrase 'to set cock on hoop,' or 'to drink festively.' Its origin otherwise is unclear. A theory, according to the Word Detective, is that it's a 'transliteration of the French phrase 'coq a huppe,' meaning a rooster displaying its crest ('huppe') in a pose of proud defiance.' Therefore, 'cock-a-hoop' would 'liken a drunken man to a boastful and aggressive rooster.'
Related