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Visual Defect / Disturbance News

Scientists Shed Light on Possible Cause of Nearsightedness

Posted 2 days 6 hours ago by Drugs.com

TUESDAY, Feb. 21, 2017 – Whether you're nearsighted or not might come down to one particular type of cell in your retina, a new mouse study suggests. Researchers from Northwestern University's Feinberg School of Medicine in Chicago report that this cell is highly sensitive to light and controls how the eye develops. If it malfunctions and tells the eye to grow for too long, images don't get focused in the retina as they should be, the researchers said. "The eye needs to stop growing at precisely the right time during childhood," said lead investigator Greg Schwartz, an assistant professor of ophthalmology. "But for years no one knew what cell carried the signal," he explained in a university news release. "We potentially found the key missing link, which is the cell that actually does that task and the neural circuit that enables this important visual function." The study was conducted ... Read more

Related support groups: Eye Conditions, Diagnosis and Investigation, Visual Defect/Disturbance, Myopia, Myopic Choroidal Neovascularization

Eye-Opening Research on Astronauts' Vision Problems

Posted 18 days ago by Drugs.com

FRIDAY, Feb. 3, 2017 – Vision deterioration is a major problem for astronauts who spend extended periods of time in space. Now researchers have identified the likely cause of the problem and a possible way to prevent it. According to researchers at UT Southwestern Medical Center at Dallas, the probable cause is the lack of a day-night cycle in intracranial pressure – pressure around the brain. The new study showed that intracranial pressure in zero-gravity conditions, such as exists in space, is greater than when people stand or sit on Earth, but lower than when people sleep. It might be possible to prevent the problem by using a vacuum device to lower pressure for part of each day, the investigators suggested. "Astronauts are basically supine [lying face upward] the entire time they are in space. The idea is that the astronauts would wear negative pressure clothing or a negative ... Read more

Related support groups: Myopia, Visual Defect/Disturbance

Laundry Detergent Pods Linked to Eye Burn Danger in Kids

Posted 2 Feb 2017 by Drugs.com

THURSDAY, Feb. 2, 2017 – Liquid laundry detergent pods may be convenient, but young children are suffering vision-threatening burns from the chemicals inside them in increasing numbers, a new study finds. Between 2012 and 2015, more than 1,200 preschoolers in the United States suffered eye burns from these single-use detergent pods. In 2012, only 12 such burns were reported. By 2015, that number was almost 500. "These pods look like toys, they look like candy, and kids are finding them, playing with them, puncturing them, and the chemicals inside the pods are getting into their eyes," said lead researcher Dr. R. Sterling Haring, from the Johns Hopkins University Bloomberg School of Public Health in Baltimore. Injuries most often occur when children play with the detergent pods and they break and the liquid squirts into their eyes. Burns also happen when kids get the soap on their hands ... Read more

Related support groups: Eye Conditions, Poisoning, Toxic Reactions Incl Drug and Substance Abuse, Visual Defect/Disturbance

Experimental Drug Shows Promise for Sight-Stealing Eye Condition

Posted 18 Jan 2017 by Drugs.com

WEDNESDAY, Jan. 18, 2017 – An experimental drug may one day make treatment simpler for patients suffering from vision-threatening age-related macular degeneration, researchers say. So far, the drug – called AXT107 – has been only tested on mice and rabbits, but it requires far fewer injections than current therapy to prevent vision loss. Current treatment requires frequent injections directly into the eye. "We anticipate injection of AXT107 in humans may have a substantially longer effect than current treatment," said lead researcher Dr. Peter Campochiaro. He's a professor of ophthalmology at Johns Hopkins University in Baltimore. "Instead of eye injections every four to six weeks, we hope it would be several months between injections," he said. The drug test in rabbits lasted only two months, but the drug appeared both safe and effective, Campochiaro said. Researchers hope to start ... Read more

Related support groups: Eye Conditions, Macular Degeneration, Eylea, Visual Defect/Disturbance, Aflibercept

U.S. Glaucoma Cases Expected to Surge by 2030

Posted 6 Jan 2017 by Drugs.com

FRIDAY, Jan. 6, 2017 – Glaucoma affects more than 3 million Americans, but that number is expected to surge to more than 4 million by 2030, eye experts say. Glaucoma is a group of incurable eye diseases that gradually lead to vision loss. There are two main types of glaucoma, but the most common form, which typically affects older people, causes an increase in pressure inside the eye that damages the optic nerve, according to the Glaucoma Research Foundation. Glaucoma is the No. 1 cause of preventable blindness, but the condition often develops without warning, the foundation said. Medication or surgery can help slow or prevent vision loss, but many people with glaucoma aren't even aware they have it. In many cases, the condition isn't detected until people lose side – or peripheral – vision. Eventually, glaucoma may cause people to permanently lose up to 40 percent of their vision, ... Read more

Related support groups: Diabetes, Type 2, Glaucoma, Diabetes, Type 1, Glaucoma (Open Angle), Pre-Diabetes, Diabetes Mellitus, Glaucoma/Intraocular Hypertension, Abnormal Glucose Tolerance, Glaucoma (Narrow Angle), Visual Defect/Disturbance, Glaucoma with Pupillary Block

Kids With Concussion Need Vision Check Before Return to School

Posted 5 Jan 2017 by Drugs.com

THURSDAY, Jan. 5, 2017 – A new study suggests that children who've had a concussion should undergo comprehensive eye exams to see if they're ready to go back to school. This is especially important, researchers said, for kids who struggle in school. "Concussed children with vision symptoms, hearing disturbances and difficulty concentrating often have academic difficulty post-concussion," said study researcher Dr. Mark Swanson. He's associate professor at the University of Alabama at Birmingham School of Optometry. "As we continue to try to improve concussion protocols, specifically when it comes to children, it is important that we understand the effects of a concussion on a child's ability to learn," Swanson said in a university news release. The U.S. Centers for Disease Control and Prevention estimates that the rate of traumatic brain injuries in children more than doubled from 2001 ... Read more

Related support groups: Head Injury, Visual Defect/Disturbance, Head Injury w/ Intracranial Hemorrhage and Loss of Consciousness, Head Injury with Loss of Consciousness

'Groundbreaking' Research Offers Clues to Cause of Dyslexia

Posted 22 Dec 2016 by Drugs.com

WEDNESDAY, Dec. 21, 2016 – People with the reading disability dyslexia may have brain differences that are surprisingly wide-ranging, a new study suggests. Using specialized brain imaging, scientists found that adults and children with dyslexia showed less ability to "adapt" to sensory information compared to people without the disorder. And the differences were seen not only in the brain's response to written words, which would be expected. People with dyslexia also showed less adaptability in response to pictures of faces and objects. That suggests they have "deficits" that are more general, across the whole brain, said study lead author Tyler Perrachione. He's an assistant professor of speech, hearing and language sciences at Boston University. The findings, published in the Dec. 21 issue of the journal Neuron, offer clues to the root causes of dyslexia. Other studies have found ... Read more

Related support groups: Visual Defect/Disturbance, Head Imaging

Could Regular Pot Smoking Harm Vision?

Posted 9 Dec 2016 by Drugs.com

THURSDAY, Dec. 8, 2016 – Smoking pot regularly may be linked to a limited degree of vision impairment, a new French study suggests. The finding stems from very preliminary research involving just 52 participants, 28 of whom were regular marijuana users. That meant they used marijuana at least seven times a week. The question posed in the study: Does marijuana affect the healthy functioning of retinal ganglion cells (RGCs), which are situated on the surface of the retina? These cells receive incoming visual information, and are considered the first link in the pathway that connects the retina to the part of the brain where eyesight is processed. The answer: Regular pot users do appear to experience a slight delay in their RGC signaling. And that could indicate impaired vision, the study authors said. Still, experts stressed that the findings remain preliminary and people shouldn't be ... Read more

Related support groups: Smoking, Smoking Cessation, Cannabis, Visual Defect/Disturbance

'Halo' Effect Common After Lasik Eye Surgery

Posted 2 Dec 2016 by Drugs.com

FRIDAY, Dec. 2, 2016 – Nine out of 10 Lasik laser eye surgery patients report satisfaction afterwards. But a sizable percentage experience new visual disturbances – like seeing halos around lights – up to six months after the procedure, a new study finds. "While Lasik has long since been proven safe and effective over decades of use, a small but significant subset of patients report post-operative effects including glare, halos and other vision symptoms, as well as dry eyes," said Dr. Christopher Starr. He's an associate professor of ophthalmology at Weill Cornell Medicine/NewYork-Presbyterian Hospital in New York City. "These effects typically resolve over time, either during the healing process, which can take up to 12 months, or with additional treatments if needed," said Starr, who wasn't involved in the new study. Of hundreds of patients surveyed, fewer than 1 percent said any ... Read more

Related support groups: Eye Conditions, Retinal Disorders, Visual Defect/Disturbance, Myopia

Lengthy Space Missions May Harm Astronauts' Vision

Posted 28 Nov 2016 by Drugs.com

MONDAY, Nov. 28, 2016 – Researchers have pinpointed the cause of a vision problem affecting astronauts who have completed long-duration space missions. The condition – called visual impairment intracranial pressure (VIIP) – has been reported by nearly two-thirds of astronauts after extended time on the International Space Station. The astronauts experienced blurred vision and were found to have structural changes, such as flattening at the back of their eyeballs and inflammation in their optic nerves. VIIP is caused by changes in the volume of clear fluid found around the brain and spinal cord, according to the study. "People initially didn't know what to make of it, and by 2010 there was growing concern as it became apparent that some of the astronauts had severe structural changes that were not fully reversible upon return to Earth," study lead author Noam Alperin said in a news ... Read more

Related support groups: Eye Conditions, Retinal Disorders, Visual Defect/Disturbance, Refraction - Assessment

Consider Eye Safety When Choosing Kids' Toys

Posted 24 Nov 2016 by Drugs.com

THURSDAY, Nov. 24, 2016 – Are you planning to shop on Black Friday for holiday gifts for the kids? Experts urge you to keep an eye on eye safety when making your choices. U.S. emergency rooms treated 251,800 toy-related injuries in 2014, according to a report last year from the U.S. Consumer Product Safety Commission. Forty-four percent of those injuries were to the head and face area. And a recent study in the journal JAMA Ophthalmology said basketball, baseball and air guns caused nearly half of all primary sports-related eye injuries. "When giving the gift of sports equipment, Prevent Blindness strongly urges also providing sports eye protection," Hugh Parry, president and CEO of Prevent Blindness, said in a news release from the group. "An eyecare professional can provide guidance for the best protection for each sport and athlete," he added. Prevent Blindness also offers these toy ... Read more

Related support groups: Eye Conditions, Eye Dryness/Redness, Visual Defect/Disturbance

Safety Group Releases Annual Dangerous Toys List

Posted 16 Nov 2016 by Drugs.com

WEDNESDAY, Nov. 16, 2016 – With the holiday season approaching, the consumer watchdog group World Against Toys Causing Harm (WATCH) has released it annual list of the most dangerous toys. The organization urges parents to be cautious when buying toys this holiday season, noting that since January 2015 there have been recalls involving more than 800,000 individual products, including 500,000 this year alone. According to WATCH, every three minutes a child is treated in a U.S. emergency room for a toy-related injury. Since January 2015, there have been at least 19 toys with safety defects recalled in the United States. These recalls involved more than 800,000 units of toys – including 500,000 this year, the group said in a news release. "Consumers can inspect new toys as well as toys already in homes and schools for dangerous hazards and stay away from any toys that may have been ... Read more

Related support groups: Eye Conditions, Eye Dryness/Redness, Fracture, bone, Corneal Abrasion, Visual Defect/Disturbance, Wound Cleansing, Wound Sepsis, Prevention of Fractures, Wound Debridement

Doctors Use iPads to Treat 'Lazy Eye,' With Mixed Results

Posted 11 Nov 2016 by Drugs.com

THURSDAY, Nov. 10, 2016 – Does playing video games on an iPad work better than standard eye-patching for improving vision in children with lazy eye? Two new studies in the journal JAMA Ophthalmology reach seemingly contradictory answers. In one, patching worked better. In the other, gaming outperformed standard treatment. "If parents prefer their child to play a computer game for an hour a day rather than wear a patch for what is usually two hours a day, then the computer games are a reasonable alternative," said ophthalmologist Dr. John Sloper, who wrote a patch-versus-play editorial for the same journal. "But there is no evidence that they produce better results in the long term." Sloper is an honorary consultant in the strabismus and pediatric service of Moorfields Eye Hospital in England. An estimated 3 percent of kids in the United States have amblyopia, or lazy eye. In these ... Read more

Related support groups: Eye Conditions, Visual Defect/Disturbance

Nearly 6 in 10 Diabetics Skip Eye Exams, Study Finds

Posted 10 Nov 2016 by Drugs.com

THURSDAY, Nov. 10, 2016 – Almost two-thirds of people with diabetes don't get annual eye exams, despite having an increased risk for serious eye disease and vision loss, researchers say. About one in 10 Americans has diabetes. Having a dilated eye exam yearly or more often can prevent 95 percent of diabetes-related vision loss, the study authors said. "Vision loss is tragic, especially when it is preventable," study lead author Dr. Ann Murchison said in a news release from the American Academy of Ophthalmology (AAO). "That's why we want to raise awareness and ensure people with diabetes understand the importance of regular eye exams," said Murchison. She is director of the eye emergency department at Wills Eye Hospital in Philadelphia. The study included information from nearly 2,000 people aged 40 and older with type 1 or type 2 diabetes. The researchers found that 58 percent didn't ... Read more

Related support groups: Diabetes, Type 2, Eye Conditions, Smoking, Smoking Cessation, Diabetes, Type 1, Insulin Resistance, Pre-Diabetes, Diabetes Mellitus, Retinal Disorders, Diabetic Retinopathy, Abnormal Glucose Tolerance, Visual Defect/Disturbance, Retinopathy

Some Primates Have Vision Troubles as They Age

Posted 8 Nov 2016 by Drugs.com

TUESDAY, Nov. 8, 2016 – Just like humans, some primates start having difficulty seeing things up close as they age. Researchers reviewed photos of 14 wild bonobos as they groomed each other. The primates were between 11 and 45 years old. The older they were, the longer they stretched their arms as they groomed, the study reported. The findings were published Nov. 7 in the journal Current Biology. "We found that wild bonobos showed the symptoms of long-sightedness around 40 years old," study author Heungjin Ryu, from the Primate Research Institute at Kyoto University in Japan, said in a journal news release. "We were surprised that the pattern found in bonobos is strikingly similar to the pattern of modern humans," he said. There have also been anecdotal reports of similar behavior in chimpanzees. Long-sightedness might hinder the social lives of older bonobos and could explain why ... Read more

Related support groups: Myopia, Visual Defect/Disturbance

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