Need for Speed Shift Nov 19, 2009
The damage model does more to impede your visual field of the track than actually impeding the handling of the car itself ... Of more permanent impact is the cracking and glazing out of your windscreen, which impedes your visual field of the track. (iAfrica.com)
Many People With Hemianopia Have Difficulty Detecting Pedestrians While Driving Nov 16, 2009
15, 2009) Schepens Eye Research Institute scientists have found that--when tested in a driving simulator--patients with hemianopia (blindness in one half of the visual field in both eyes) have significantly more difficulty detecting pedestrians (on their blind side) than normally sighted people ... In at least 22 states and many other countries, people with hemianopia are prohibited from driving because they do not meet the visual field requirements for licensure ... More than a million people... (Science Daily)
Readers Respond on "Grassoline" Nov 14, 2009
In humans information from the left visual field of each eye is processed in the right hemisphere, and vice versa. Is this not the case with chickens, or does this fact cast doubt on Rogers s conclusions. (Scientific American)
Brain Research on Hypnosis Oct 26, 2009
These include hysterical blindness, hysterical paralysis and visual neglect where the person has awareness of only half their visual field, to name a few. These are conditions that usually only occur in patients with other serious psychological disorders such as schizophrenia which makes them difficult to study. (Suite101.com)
Sudden moves spark brain battle Oct 24, 2009
The scientists then presented a fast-approaching dot in the owls visual field, positioning the dot so that it would stimulate a particular region of the isthmotectal network. A subset of neurons in the region responded to the dot by firing at a high rate, which had the animal been awake might have directed its eyes and attention towards the potentially menacing dot. (Scientific American)
Mona Lisas smile cracked Oct 23, 2009
These channels encode data about an object's size, clarity, brightness and location in the visual field. "Sometimes one channel wins over the other, and you see the smile, sometimes others take over and you don't see the smile," says , a neuroscientist at Institute of Neuroscience in Alicante, Spain, who conducted the study along with Diego Alonso Pablos. (Harper's Magazine)
Sight Unseen: People Blinded by Brain Damage Can Respond to Emotive Expressions Oct 15, 2009
Although they are not aware of information in their visual fields, that input, whether it is a color, shape or facial expression, is still entering their eyes and being sent to and processed by other regions of their brains ... Even though both of their eyes was sending information from both sides of the visual field to the visual cortex, damage to the left side of the visual cortex, for example, made the patient effectively blind in the right side of the visual field ... The patients responded... (Scientific American)
The Imaginary Pirate of Globalization, Antoine Garapon, Eurozine Sep 23, 2009
"Every time a new breakthrough in historical forces occurs, whenever a new explosion of new kinds of energy causes new countries and new seas to enter the visual field of human awareness, the areas of historical existence also shift. At that point new criteria, new sciences, new orders appear; peoples come to life or are reborn. This redeployment may be so radical and so deeply felt that it brings about changes not only in size and scale, in the external horizons of mankind but also in the very... (Harper's Magazine)
Out Of Darkness, Sight: Rare Cases Of Restored Vision Reveal How The Brain Learns To See Sep 19, 2009
13, 2009) In macular degeneration, the most common form of adult blindness, patients progressively lose vision in the center of their visual field, depriving the corresponding part of the visual cortex of. (Jan. (Science Daily)
R-Tech Ueno Completes Subject Enrollment in Phase 2 Clinical Study of 0.15% UF-021 Aug 25, 2009
Patients generally suffer from peripheral visual field loss and low vision in the late stage of the disease. At present, there is no effective treatment for this disease. (PR Newswire)
A "Complex" Theory of Consciousness Aug 19, 2009
The surgery literally splits the person s consciousness in two, with one conscious mind associated with the left hemisphere and seeing the right half of the visual field and the other mind arising from the right hemisphere and seeing the left half of the visual field. 1. (Scientific American)
Potential glaucoma treatment tested Aug 5, 2009
Two of the three showed improved visual fields, while the visual field stabilized for the third. And, the researchers said, the improvements remain even three months after the treatments were finished. (Chippewa Falls Chippewa Herald, WI)
Epilepsy gene identified in dogs Aug 4, 2009
"These animals will jerk in response to quite specific things, such as sudden movement in their visual field," said Science co-author Clare Rusbridge, a veterinary neurologist at the Stone Lion Veterinary Centre in London. "They also do it when there is flickering light - this is one of the photosensitive epilepsies. One of the simplest managements is doggy sunglasses, which means they can be walked and enjoy life," she told the BBC News website. (BBC News -- Science)
Click here to read more. Aug 3, 2009
The condition left the center of his visual field dark, though he still has some peripheral vision. It did not, however, destroy his artistic spirit. (Fredericksburg.com, VA)
Adult Brain Can Change Within Seconds Jul 30, 2009
When a square object was placed outside this blind region, the patient perceived it as a rectangle stretching into the blind area a result of the the deprived neurons now responding to a neighboring part of the visual field ... Even when one eye is closed, we are not normally aware of a gap in our visual field. (Science Daily)
Patent win gives Mass. Eye and Ear windfall Jul 29, 2009
Macular degeneration damages the center of a person s visual field, making it the leading cause of vision loss in people over 50 in the developed world. Dr. Joan W. Miller and Dr. Evangelos Gragoudas developed the therapy in research labs at Mass. (Boston Globe)
How to install your HDTV Jul 29, 2009
If you sit in the first row, your visual field will be completely filled by the screen, perhaps overly so. Sit in the back row, and immersion will be much less. (San Francisco Chronicle -- Technology)
The 'see food' diet Jul 23, 2009
Age-related macular degeneration (AMD), loss of vision in the center of the visual field (macula) due to retinal damage, is one of the leading causes of legal blindness among the elderly. Approximately 10% of people from 66 to 74 years of age will develop some level of macular degeneration, making it difficult for them to read or even recognize faces. (EurekAlert!)
Loss of sight Jul 15, 2009
Diagnosis of patients who already have glaucoma can be done by observing their nerve damage or visual field loss through several tests. Glaucoma is treatable but not curable. (The Star Online, Malaysia)
Mini-Strokes May Cause Vision Loss Jul 9, 2009
A study done several years ago by the Glaucoma Research Foundation found that lowering eye pressure reduced visual field loss in such cases, he said. But sudden changes in vision were seen in some study participants, Iwach said, "and one characteristic of a vascular process is that you can have such sudden changes." Though eye pressure remains the dominant factor in glaucoma, "we are continuing to look for other contributing factors, and high on our list has been the vascular component," he... (MEDLINEplus)
Clue to normal-tension glaucoma; herpes infection and corneal transplants Jul 1, 2009
One study reports on silent cerebral infarcts (SCI) incidence and visual field loss in patients with normal-tension glaucoma; the other correlates inflammation biomarkers with corneal transplant rejection in herpes simplex patients. Silent Cerebral Infarcts: Risk Factor for Visual Field Loss as Well as for Stroke ... For one thing, an increased incidence of silent cerebral infarct (SCI), blockage in small blood vessels in the brain, is seen in brain scans of people with NTG. Also, visual field... (EurekAlert!)
Brain Detects Happiness More Quickly Than Sadness Jun 22, 2009
The researchers worked with 80 psychology students (65 women and 15 men) to analyze the differences between their cerebral hemispheres using the "divided visual field" technique, which is based on the anatomical properties of the visual system. "What is new about this study is that working in this way ensures that the information is focused on one cerebral hemisphere or the other", J. Antonio Aznar-Casanova, one of the authors of the study and a researcher at the University of Barcelona (UB),... (Science Daily)
Brains detect happiness faster than sadness Jun 19, 2009
The research team worked with 80 psychology students, 65 women and 15 men, to analyse the differences between their cerebral hemispheres using the "divided visual field" technique, which is based on the anatomical properties of the visual system. "What is new about this study is that working in this way ensures that the information is focused on one cerebral hemisphere or the other," J Antonio Aznar-Casanova, one of the authors of the study and a researcher at the University of Barcelona (UB),... (India Times, India -- Health/Science)
Had Your Eyes Checked Lately? Jun 16, 2009
For example, vision loss for people with glaucoma occurs at the edges of the visual field, Iwach said. "By the time you realize something is wrong, a lot of vision loss has occurred," he said. (MEDLINEplus)
More of this story Jun 16, 2009
A piece of equipment that has been part of Dr. Stanchfield's office since 1990 is the Humphry Visual Field Analyzer ... "It also allows us to document visual field changes which may be related to certain brain tumors such as pituitary gland tumors.". (Cut Bank Pioneer Press - Golden Triangle, MT)
HealthWatch: Macular Degeneration Jun 2, 2009
Someone with macular degeneration like Nigel, develops a blind spot in the center of their visual field ... The telephoto effect allows images in the central visual field to not be focused directly on the damaged macula, but rather spread over other healthy areas of the central and peripheral retina, compensating for the blind spot. (CBS 2, NY)
Intraocular Pressure and Glaucoma May 31, 2009
For example, individuals may find that the center of their visual field is intact while their peripheral vision fades away, a phenomenon commonly referred to as tunnel vision. If the disease progresses, impairment eventually involves the entire visual field, resulting in blindness ... Visual Field Test: By moving a small object in and out of the patient's field of vision, the physician can determine which parts of the visual field are impaired. (Suite101.com)
Chetek native isn't slowing down after losing 97 percent of sight May 28, 2009
"It wasn't like accommodations couldn't be made, but it is a very visual field." ... He decided to enroll as a master's student in a safety and risk control program at Stout, but after one semester, he realized that it, too, was a very visual field. (Chetek Alert, WI)
Neurosurgeons Operated on Own Dog May 20, 2009
"We called in some favors," Wadon says, and obtained the necessary scans -- which, under general anesthesia, revealed a large brain tumor that was affecting Homer's visual field and appetite control. He had gained 30 pounds. (The Pilot Newspaper)
Fish, olive oil, nuts good for eyes too May 12, 2009
Some people with early AMD (but not all of them) will develop late AMD, in which a person has larger drusen and a blurred area at the center of their visual field. Right now, the only confirmed risk factors for the condition are age, genes, and smoking, so scientists are hoping to identify things that people can do to reduce their risk for the condition. (CNN -- Health)
Brain Anatomy Could Point to Autism May 6, 2009
"We also found that this enlargement was related to something called joint attention, or the ability of a young child to take cues from an adult about where to look in the visual field, for example, at an object of interest," he said. This ability develops in a narrow window, between 9 and 15 months, and is thought to be a fundamental deficit in autistic individuals that predicts poor outcomes in social behavior and language, Piven explained. (MEDLINEplus)
Complex play chews on moral dilemmas Apr 30, 2009
I would love to have heard him speak for himself through the able hand of the playwright, who knows the value of coupling compelling language with the visual field of theater. Whatever my wishes, "Man in the Attic" offers thoughtful and engaging theater through a solid cast, smart staging, able direction by Dick Reichman and a powerful script by the playwright who wrote "Kafka Dances.". (Anchorage Daily News)
Strokes strike kids Apr 28, 2009
Visual field defects. Seizures (epilepsy). (San Francisco Chronicle)
Study reports success in treating a rare retinal disorder Apr 14, 2009
Improvement was defined by several measures, including the ability to read a minimum of two additional lines on the standard eye chart or expansion of at least 25% in visual field size. "The results challenge the commonly held belief that autoimmune retinopathy is untreatable," says John R. Heckenlively, M.D., author of the report and an international expert on retinal dystrophies. (EurekAlert!)
How The Retina Works: Like A Multi-layered Jigsaw Puzzle Of Receptive Fields Apr 8, 2009
However, within each regular lattice, the individual cells' receptive fields have irregular and inconsistent shapes, which could potentially result in patchy coverage of the visual field. To understand how the visual system overcomes this problem, postdoctoral researcher and first author Jeffrey L. Gauthier, Ph. (Science Daily)
Visual Attention: How The Brain Makes The Most Of The Visible World Apr 7, 2009
Neurons in the visual cortex view the world through their "receptive fields," the small portion of the visual field individual neurons actually "see" or respond to ... Multiple representations of objects in our visual field are constantly competing with each other for our brain's. (Science Daily)
Rigorous Visual Training Teaches the Brain to See Again After Stroke Apr 1, 2009
Every few seconds, a group of about 100 small dots appears within a circle on the screen, somewhere in the person's damaged visual field - in other words, when the patients stare at the square, they don't initially see the dots. The dots twinkle into existence, appear to move as a group either to the left or the right, then disappear after about one-half second. (PR Newswire)
FDA Advisory Panel Recommends Approval of VisionCare's Implantable Telescope for End-Stage Macular Degeneration Apr 1, 2009
End-Stage AMD is characterized by central scotomas, or blind spots, in both eyes that cause images in the central visual field to be unrecognizable or not visible at all. About the Telescope Device. (PR Newswire)
Video games 'can improve vision' Mar 30, 2009
He said other work had shown that it was possible to train people to improve some aspects of their vision - for instance, to widen the visual field. But he said: "Contrast sensitivity is a very basic visual function, and usually they are more difficult to alter in adulthood. "This is a small study, showing a small effect, but it was carefully done, and merits further investigation. (BBC News -- Health)
Music therapy 'restores vision' Mar 24, 2009
They lose the ability to track objects in their visual field on the side opposite to where their brain has been damaged by the stroke. The Proceedings of the National Academy of Sciences study suggests music can help ease the problem. (BBC News -- Health)
Virtual reality tests balance treatments Mar 18, 2009
"What we have noticed here is optic flow [movement of the visual field]; that it's all this stuff that moves past you that's very disorienting," Dr. Whitney said, with Dr. Calabrese nodding in agreement. "We think that's what is [causing the balance problems], and that's part of what we're trying to learn. We ask Paula and others what bothers them in this store, and we're trying to get some sense of what it is so we can ... better simulate it here and gradually get them used to handling it.". (Pittsburgh Post-Gazette, PA)
What Drives Brain Changes In Macular Degeneration? Mar 14, 2009
13, 2009) In macular degeneration, the most common form of adult blindness, patients progressively lose vision in the center of their visual field, thereby depriving the corresponding part of the visual cortex of input ... This "preferred retinal locus" (PRL) is often below the blind region in the visual field, leading patients to roll their eyes upward to look at someone's face, for example ... The visual cortex has a map of the visual field on the retina, and in macular degeneration the... (Science Daily)
A 19th-century warehouse becomes a place of contemplation Mar 7, 2009
The ceiling of ipe, a Brazilian hardwood, warms the visual field. A polished Italian-slate bench is a monolith. (Globe and Mail)
What a strange, thrilling trip this is Mar 7, 2009
Finally, there are moments of deep mystery, like his monochrome Ailleurs (1993), a wide dark visual field of a colour that one cannot name: dark green, dark grey, brown, at moments even dark aubergine. Tousignant has created a colour that language cannot describe, a deeply vegetative, fathomless darkness full of life, like the depths of a lake, or a mossy shadow at the edge of twilight. (Globe and Mail)
How One And The Same Nerve Cell Reacts To Two Visual Areas In Flies Mar 1, 2009
In their input region, VS-cells do indeeed respond to movement in only a narrow area of the visual field. In contrast, in the cells' output region, each cell also responds to movement in the receptive fields of its neighbouring cells. (Science Daily)
Oak Ridge technology can save vision Feb 19, 2009
Macular degeneration is a condition usually affecting older adults which results in a loss of vision at the centre of the visual field (the macula) because of damage to the retina. Using a technology originally developed at the Oak Ridge National Laboratory (ORNL) to understand semiconductor defects, three locations in Memphis have been equipped with digital cameras that take pictures of the retina. (India Times, India -- Health/Science)
Seeing the World in Half-View Feb 12, 2009
If the right parietal is damaged, however, the left visual field is unattended; in other words, unilateral neglect occurs. It is fairly easy to diagnose neglect. (Scientific American)
TODDLER TO HAVE HALF OF HER BRAIN REMOVED AT HOPKINS Feb 8, 2009
When they told me they were pretty sure she already has a visual field cut, that took away some of my guilt. I didn t want to take away any skill she could develop. (Dundalk Eagle, MD)
