Light-sensing worms provide a new tool for the study of vision

A team from the University in Michigan, led by Shawn Xu, has discovered that tiny worms can sense light. They discovered that the chemical reactions used by the C. elegans ( a 1mm sized worm which is one of the most commonly used model animals in genetic research) are rather similar to the ones in humans. This discovery means that from now on the worm can be used for the research of building blocks of human vision, as well as how disrupting the phototransduction pathway can lead to eye disease. This discovery may lead to further breakthroughs in the research of vision, helping researchers understand the basis of human vision diseases and promote the understanding of the evolutionary development of eyes in various speci...

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Experiment seeks to head off Type 1 diabetes

Researchers at Children's Hospital of Pittsburgh are hoping to control type 1 diabetes by curbing the rogue immune cells that cause it, before patients become completely dependent on daily insulin injections tosurvive. About 3 million Americans have Type 1 diabetes, where the body mistakenly attacks and destroys cells in the pancreas that produce insulin, the hormone crucial to converting blood sugar to energy. This novel vaccine -- made from patients' own blood blocks the '911 call' that dendritic cells send to direct T cells to the pancreas. Just altering three communication molecules on their surface basically confuses and paralyzes the T cells. In mice and monkeys, the reprogrammed cells ended the vicious cycle of a pancreas attack...

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UAW retirees swamping optometry offices in Indiana

Image via WikipediaThe Indianapolis Star reported that, in Indiana, optometry offices have been swamped with United Auto Workers retirees who want to squeeze in one last visit before the coverage evaporates. According to Bill Matthews, of UAW Local 23, Indiana is home to about 100,000 hourly UAW retirees & all of them have been affected by the change. The Star described the plight of one retiree who has diabetes and needs regular eye examinations. David Ehman had his eyes checked in the past year, so he cannot make one more covered visit to his optometrist. The last visit he and his wife made to the eye doctor, with coverage, she left with new eyeglasses and he with a fresh set of contact lenses for a combined bill of nearly $800....

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ವೀಡಿಯೊ ಗೇಮ್ ಟು ಟ್ರೀಟ್ ಲಜ್ಯ್ ಎಯೇ

Image via WikipediaAmblyopia, otherwise known as lazy eye, is a disorder of the visual system that is characterized by poor or indistinct vision in an eye that is otherwise physically normal, or out of proportion to associated structural abnormalities. It has been estimated to affect 1–5% of the population.Treatment consists of correcting the optical deficit and forcing use of the amblyopic eye, either by patching the good eye, or by instilling topical atropine in the eye with better vision. This, according to the researchers, can lead to social stigma during a formative part of childhoodA review was published recently in Vision Research of a new computer based therapy developed by researchers from Tel Aviv University.Dr. Uri Polat, Tel Aviv...

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Human organ and tissue transplantation has become an important and growing part of modern medical practice. Advances in medical technology have resulted in millions of Americans receiving these life-saving or life-enhancing gifts. Eye banks can provide the most precious gifts of the world that is the gift of vision. N.C. Eye Bank has the distinction of being the provider of most corneas in the world. Eye Bank Association of America reports that the NC based organization provided corneas for 3,440 transplants in 2008; the most of any eye bank in the world. Eye banks make these transplants possible by processing donated corneas and supplying them to surgeons. According to Bob Russ, the eye bank's director of human resources, the expansion of opportunities to sign up for organ donation is one...

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Relationship between omega-3 fatty acids, risk of AMD

According to a study published online June 9 in the British Journal of Ophthalmology, the association between omega-3 fatty acids and lower risk of age-related macular degeneration (AMD) appears to be modified by other dietary supplements and disease stage. For the study, researchers from Tufts University performed an analysis of data from 2,924 patients participating in the Age-Related Eye Disease Study, an eight-year supplementation trial. Dietary intake was assessed using food-frequency questionnaires. The investigators found that a high intake of the omega-3s docosahexaenoic acid (DHA) and eicosapentaenoic acid...was associated with a lower risk of progression to advanced AMD. The team also found that patients who had low glycemic index diets and high consumption of the omega-3...

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Optometric vision therapy described as life-transforming

In an opinion piece in the Los Angeles Times Susan R. Barry, professor of neurobiology in the department of biological sciences at Mount Holyoke College and the author of Fixing My Gaze: A Scientist's Journey Into Seeing in Three Dimensions, writes, Children are still not routinely tested for binocular vision deficits because the standard school vision exam (reading the eye chart with one eye at a time) doesn't screen for defects in eye coordination or stereovision. As a result, many children with vision problems may be labeled learning disabled, or if they misbehave in frustration, diagnosed with attention-deficit hyperactivity disorder. At age 48, Barry, who suffered from crossed eyes and stereoblindness since childhood, consulted a developmental optometrist who prescribed a program of...

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Red Meat Linked To Blindness in Old Age

A new study from Australia suggests that eating lots of red meat is linked to a higher risk of developing age-related macular degeneration (AMD), a leading cause of blindness in old age.The study was the work of first author Dr Elaine Chong, who is from the Centre for Eye Research Australia based at the University of Melbourne, and colleagues, and is published on 1 April in the advance access issue of the American Journal of Epidemiology.The results showed that: * At follow up, 1,680 participants had early stage AMD and 77 had late stage AMD. * Higher red meat intake was positively associated with early AMD (ie more red meat linked to higher chance of having early AMD). * The odds ratio for eating meat ten times a week or more versus...

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Blind Man Navigates Obstacle Maze Unaided

Researchers have demonstrated for the first time that people can successfully navigate an obstacle course even after brain damage has left them with no awareness of the ability to see and no activity in the visual cortex, a region of the brain's cortex that is primarily responsible for processing visual inputs. The findings reported by NY Times published in the December 23rd issue of Current Biology, a Cell Press publication, reveal the importance of alternative routes in the brain, which are active in both those who have suffered severe brain damage to the visual cortex and in all of our everyday lives, according to the researchers. See a video hereEarlier studies had shown a similar ability in monkeys with comparable brain lesions. The new...

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opical anti-inflammatories may be effective in keratoconus

While the etiology of keratoconus remains unclear, Albert Jun, MD, PhD, reviewed new research indicating that an inflammatory component can be measured in altered concentrations of inflammatory molecules such as IL 6, IL 10, TNF-alpha and matrix metalloproteinases. This evidence may support the study of topical anti-inflammatory drops for treating and preventing disease advancement, he said at the symposium, which was jointly sponsored by Wilmer Eye Institute and the Maryland Optometric Associati...

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Homeless, but with clearer vision

My school has always played a significant role in the Boston community. During my training and residency I worked at many of the sites belonging to the New England Eye network.New England College of Optometry has a program that benefits the homeless and is run by Ceida Chan, OD. This free program offers eye exams administered by students in the third year of the 4 year course as part of their clinical rotation. Many in the homeless community suffer from Diabetes and infectious disease and eye trauma. So this service meets two important needs - in providing medical care and helping in training students to see patients in a 'non clinical' environment, sometimes completing exams with portable equipment.Boston newspaper covered this h...

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Experimental stem-cell therapy for blindness

MIT's Technology Review reports that a new treatment for eye disease, developed by Advanced Cell Technology (ACT) uses human embryonic stem cells to re-create retinal pigment epithelium (RPE) cells in the retina that support the photoreceptors needed for vision. RPE cells are often the first to die off in age-related macular degeneration and other eye diseases, which in turn leads to loss of vision. Now, the experimental therapy has proved safe and effective in animal studies, and may begin early human trials in the next few months if it receives approval from the Food and Drug Administration. According to Robert Lanza, ACT's chief scientific officer, not only does the RPE treatment avoid the problem of immune rejection, but the cells themselves are relatively easy to create, as...

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TV segment features device designed to restore some vision to the blind

NBC Nightly News reported that a new device offers the enormous promise of restoring sight for those who don't have it. Chief science correspondent Robert Bazell interviewed Kathleen Blake, once totally blind, but now able to see, thanks to a tiny TV camera mounted on her sun glasses that sends images to electrodes placed on the back of her eye. For 20 years, Dr. Mark Humayun and his team at the University of Southern California (USC) have been working toward the amazing goal of restoring vision to the blind. Not long ago, the USC researchers achieved great improvement in the device, going from 16 electrodes to 60, enabling better sight. According to Bazell, Soon, the glasses will go. Armand Tanguay, an electrical engineer, is developing cameras to be implanted directly in the...

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Prevalence of Dry Eye Disease Among US Men

According to a study published in the June issue of the Archives of Ophthalmology, after age 50, approximately 4% of males develop dry-eye disease. For the study, researchers from Brigham and Women's Hospital analyzed data on 25,444 men, who were asked if they had ever been diagnosed with dry-eye disease and also whether they had symptoms, including dry or irritated eyes. The team found that about three percent reported a previous diagnosis of dry eye, while 6.8 percent said they had constantly or often experienced at least one symptom, such as dryness or irritation. Nearly 2.2 percent reported both symptoms constantly or often. The authors explained that increasing age, high blood pressure, benign prostatic hyperplasia, and the use of...

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According to a study published in the British Journal of Ophthalmology, people with age-related macular degeneration (AMD) should eat oily fish at least twice a week, because omega-3 fatty acids found in abundance in oily fish appear to slow or even halt the progress of both early and late stage disease. BBC reports that, for the study, researchers at Tufts University examined data on almost 3,000 people taking part in a trial of vitamins and supplements. The team found that progression to both dry and wet forms of advanced AMD disease was 25 percent less likely among those eating a diet rich in omega-3 fatty acids. In addition, people with advanced AMD who also consumed a low glycemic-index diet and who took supplemental antioxidant vitamins and minerals like vitamin C and zinc appeared to...

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Researchers associate intermittent exotropia with mental illness in early adulthood.MedPage Today reported that, according to a study published in the June issue of Archives of Ophthalmology, children with intermittent exotropia, which is a form of strabismus in which the eyes deviate outward, may have a nearly threefold increased risk of developing mental illness by early adulthood. For the study, researchers from the Mayo Clinic followed 183 patients who were diagnosed with intermittent exotropia, 118 of whom were female. The cohort, plus age- and sex-matched controls, was followed to a mean age of 21.9 years. The investigators found that overall, a psychiatric disorder, including depression or anxiety, was diagnosed in 97 (53 percent) of...

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HealthDay reported that, according to a survey conducted by the American Optometric Association (AOA), even though people who wear eyeglasses or contact lenses constitute 81 percent of the population, approximately one of every five of them hasn't seen an eye doctor or eye-care specialist in more than two years, the recommended period between eye checkups. Three of every five of those who don't use corrective lenses said that they had not had a vision exam in more than two years. Some eye doctors believe this is because most vision problems aren't readily apparent, and because people have enough on their plates. AOA spokesman and optometrist Kerry Beebe, OD, said that the problem with these perceptions is that most eye diseases come on subtly. Once someone recognizes vision loss,...

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ಸುರ್ಗೆರಿ ಫಾರ್ ರೆದಿಂಗ್ ಗ್ಲಸ್ಸೇಸ್

Pennsylvania's Times Leader reported that with the insertion of the Tecnis multifocal lens, patients with presbyopia, a visual condition that becomes apparent especially in middle age and in which loss of elasticity of the lens of the eye causes defective accommodation and inability to focus sharply for near vision, will regain the ability to see more clearly and not need to rely on reading glasses or bifocals again. Notably, 88 percent of those who received the Tecnis in both eyes reported never wearing glasses four to six months after surgery, and more than 90 percent never needed glasses for distance activities, such as driving, or near activities, such as reading, according to Frank Bucci, MD, who was one of 12 surgeons in the...

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MedPage Today (6/1, Neale) reported that, according to a study published in Ophthalmology, common bacteria found on the eye were susceptible to newer-generation fluoroquinolones. For the study, researchers from Korea's Yonsei University College of Medicine obtained samples from 105 patients using conjunctival swabs immediately before refractive surgery. Coagulase-negative staphylococci (CNS) were found in 84.9 percent of the cultures; nearly one-third of those (31.4 percent) were methicillin-resistant. Also found were Staphylococcus aureus (2.3 percent), Streptococcus pneumoniae (1.2 percent), and gram-negative bacilli (4.8 percent). Next, the investigators treated the cultures with three newer-generation fluoroquinolones -- gatifloxacin, moxifloxacin, and gemifloxacin -- and two older-generation...

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