Articles tagged with Retina
Scientists discovered characteristic amyloid plaques in human retinas and developed a noninvasive optical imaging technique to detect retinal plaques in live laboratory mice. The study suggests the possibility of early noninvasive diagnosis and monitoring of Alzheimer's disease through retinal imaging.
Researchers at Medical College of Georgia are investigating a link between hemochromatosis and the wet form of macular degeneration. They suspect that excessive iron levels accelerate aging in the eyes, leading to increased risk of vision loss.
Scientists at UCI created an eight-layer, early-stage retina from human embryonic stem cells, a complex tissue structure that could lead to transplant-ready retinas for treating eye disorders. The breakthrough uses differentiation technique to create multiple cell types necessary for the retina, mimicking early-stage retinal development.
Research confirms green tea catechins penetrate eye tissues, potentially protecting against glaucoma and other eye diseases. The study, published in Journal of Agricultural and Food Chemistry, found that these antioxidants absorbed by the eyes reduced oxidative stress for up to 20 hours.
A Kansas State University researcher is studying the potential of Chinese wolfberries to improve damage to the retina caused by type-2 diabetes. The findings show that the fruit can lower oxidative stress, protecting the eye and potentially preventing age-related macular degeneration and diabetic retinopathy.
Scientists have identified 65 abnormal proteins in diabetic mice that are reversed by treatment with the ARB medication candesartan. The study, published in Journal of Proteome Research, provides new insights into the potential benefits of high blood pressure drugs in preventing and treating diabetic retinopathy.
Scientists have confirmed that green tea catechins penetrate into tissues of the eye, raising the possibility of protection against glaucoma. Analysis of eye tissues showed significant absorption of individual catechins, with effects lasting up to 20 hours.
Scientists studying fruit flies have discovered a critical step in fly vision that is also linked to human retinal dystrophies, which cause visual impairments or blindness. The study's findings suggest that using flies as a model organism can lead to the development of new therapies for treating human retinal degeneration.
Researchers mapped chicken retinas, discovering a complex pattern of color receptors that maximizes their ability to see colors. This superior vision may help birds find mates and feed on colorful fruit, and could lead to insights into treating human genetic disorders.
A new tool called PEG-POD significantly increases gene delivery to retinal cells, outperforming existing carriers and DNA alone. This breakthrough may help develop therapies for conditions like retinitis pigmentosa and age-related macular degeneration.
Researchers discovered a link between diabetes and bone marrow nerve damage that may help treat retinopathy. The abnormal release of stem cells from damaged nerves affects the body's ability to repair blood vessels, leading to blindness.
Scientists have discovered a pivotal role for two key proteins in preventing the onset of age-related macular degeneration. The study found that one protein binds to another to reduce damage caused by inflammation, and that genetic variations can make people more vulnerable to eye damage.
A UCLA study published in the American Journal of Ophthalmology found that older women who quit smoking had a significantly lower risk of developing advanced age-related macular degeneration. The research, led by Dr. Anne Coleman, followed 1,958 women over five years and showed that even after age 80, quitting smoking can reduce AMD risk.
Researchers found that injecting triamcinolone into the eye may slow proliferative diabetic retinopathy progression, but not macular edema. Steroid treatments reduced the risk of retinopathy progression without significantly improving vision outcomes.
Researchers found a statistically significant increase in myopia prevalence among US participants from 1971 to 2004, with higher rates observed in younger individuals. The study suggests that modifiable risk factors for myopia development could lead to the creation of cost-effective intervention strategies.
A study published in the Journal of Ocular Pharmacology and Therapeutics reveals Pycnogenol improves microcirculation, retinal edema, and visual acuity in early stages of diabetic retinopathy. Visual acuity improved by 17/20 after two months of treatment.
Scientists found that a lack of diffusible VEGF causes retinal defects like geographic atrophy, which may impact the use of anti-VEGF drugs for wet macular degeneration. The study increases understanding of AMD's causes and offers potential new therapies.
Researchers at Johns Hopkins School of Medicine found that cells in the retina can remain alive for many months and recover some or all normal function even without a proper blood supply. The study suggests that restoring blood supply to deprived regions of the retina may restore visual function.
Researchers found that implantation of blue light-filtering IOLs at cataract surgery increased macular pigment levels, which may offer protection against age-related macular degeneration. The study suggests a strong scientific rationale for the benefits of blue light-filtering in reducing vision loss.
Researchers have discovered that Alzheimer's disease can cause changes in the retina, which may predict how well treatments will work. The findings could lead to the development of retinal imaging technology for earlier diagnosis and treatment of Alzheimer's, a leading cause of elderly dementia.
Researchers at the University of Michigan have found that genes involved in fin regeneration and heart repair are also required for rebuilding damaged light receptors in the eye. The study suggests that a common molecular mechanism guides the process, no matter what body part is damaged.
Vision scientists at Washington University School of Medicine identified a process that allows the human eye to adapt to darkness quickly, also enabling it to function in bright light. This discovery may contribute to better understanding of age-related macular degeneration and potential treatments.
Researchers at MIT have designed a retinal implant that can help restore some vision in individuals who have lost their sight due to these conditions. The chip stimulates nerve cells in the retina to bypass damaged layers and transmit signals to the brain.
Researchers at Duke University Medical Center have developed a handheld device that uses SD OCT to create 3-D images of the retina, allowing for early detection of retinopathy of prematurity. The technology can snap pictures up to 40 times faster than previous versions and is being used to analyze data on over 20 infants.
A new study found that supplementing babies' formula with DHA boosts their cognitive development. The research, published in Child Development, showed that babies who received formula supplemented with high concentrations of DHA performed better on a problem-solving test and displayed more intentional behaviors.
Researchers found that a 1-milligram dose of triamcinolone significantly improved vision in some patients with retinal vein occlusion. The treatment also showed superior safety compared to existing laser therapies. However, grid photocoagulation remained the preferred option for those with blockages in smaller branches of the vein.
Researchers found that brain predicts what eyes in motion will see, even before they move, allowing for a stable visual environment despite retinal image shifts. This remapping process enables continuous representation of locations across eye movement, facilitating the transition between current and expected images.
A University of Wisconsin-Madison team successfully grew multiple types of retina cells from two types of stem cells, suggesting a potential future in repairing damaged retinas. The discovery will also lead to laboratory models for studying genetically linked eye conditions and screening new drugs.
Researchers have discovered that gene therapy can restore vision in adults with Leber congenital amaurosis type 2, a rare form of blindness. The treated parts of the retina have acquired image-processing strength to rival the normal center for visual perception.
Researchers report significant visual benefits in three young adults with Leber congenital amaurosis, a previously untreatable form of blindness. The gene therapy, which restored the RPE65 protein necessary for vision production, has shown safety and stability over one year.
Researchers found bats possess two spectral cone photoreceptor types for daylight and colour vision, as well as increased sensitivity to UV light in cone-stimulating conditions. This adaptation is expected to improve visual orientation at twilight, predator avoidance, and flower detection.
Neuroscientists have pinpointed the brain's MT+ area as responsible for processing 3-D motion. The region encodes two types of cues from moving objects, including binocular disparity and retinal motion, to create a 3-D perception.
Researchers studied microglial cells in mouse retina to understand their response to neurodegenerative processes. Their work may aid in the development of therapeutic strategies for Parkinson's and Alzheimer's diseases.
Researchers at the University of California, San Diego, have identified a potential new treatment for retinopathy in premature infants using JNK1 inhibitors. The study found that inhibiting JNK1 reduced abnormal blood vessel growth and vision loss in mouse models of ROP.
A randomized placebo-controlled study found no significant differences in electroretinography, visual function tests, or eye anatomy between men taking tadalafil or sildenafil and those taking a placebo. The study suggests that PDE5 inhibitors do not cause cumulative damage to the retina over six months.
Scientists at Schepens Eye Research Institute found that TGF-β helps maintain the health of blood vessels in the retina. The study's results suggest that blocking TGF-β can cause retinal dysfunction and lead to diseases like diabetic retinopathy and macular degeneration.
Researchers found that individual receptive fields have irregular shapes but interlock to form a regular lattice, enabling high-resolution vision. The nervous system operates with higher precision than previously thought, overcoming potential problems with uneven visual coverage.
Researchers at Florida State University have identified a mutated gene in zebrafish that determines the development of photoreceptors, which could provide new insight into inherited retinal diseases in humans. The study, published in PNAS, reveals the genetic switch responsible for cells developing as rods or cones.
Researchers created ultra-detailed 3-D images of over 2,000 people's eyes to study age-related macular degeneration (AMD). The high-resolution images provide a detailed view of the retina's layers and abnormalities that cause AMD.
Researchers have developed a new way to detect early stages of diabetic retinopathy using beams of light to measure blood flow in the back of the eye. This technique may provide a more quantitative and less invasive method for diagnosing the condition, potentially cutting costs.
Researchers found that vigabatrin reduces taurine levels, leading to retina cell degeneration induced by light. Introducing a taurine-rich diet and reducing light exposure can help curb secondary effects in children treated with the drug.
Researchers have discovered how rhodopsin communicates with transducin in the retina, shedding light on vision's molecular processes. This breakthrough could lead to more targeted treatments for diseases like diabetes, allergies, and certain cancers.
A new study has found that build-up of infected blood cells in brain's narrow vessels leads to lack of oxygen, causing lethal damage. The research provides strong evidence for understanding why cerebral malaria is so deadly and may lead to new therapeutic measures.
Researchers found that vascular endothelial growth factor (VEGF) and intercellular adhesion molecule (ICAM)-1 are key players in the development of diabetic macular edema (DME), a serious complication of retinopathy. The study suggests that intravitreal injection of steroids like triamcinolone acetonide may be useful in treating DME.
Researchers are studying the mechanisms behind cytomegalovirus-induced cell death in the retina, which may lead to new treatment targets. Understanding this process could also provide insights into how the retina responds to other insults such as diabetes or infection.
Retinal detachment is a condition that affects about 10,000 Americans each year, putting vision loss or blindness at risk. NewYork-Presbyterian/Weill Cornell ophthalmologist Dr. Donald J. D'Amico highlights advanced surgical techniques that offer high probabilities of reattachment and visual improvement.
Researchers at the University of Washington have reported that mammals can be stimulated to regrow inner nerve cells in their damaged retinas. The study used a specific type of cell called Müller glia and found that it could be encouraged to regenerate in living mice by injecting growth factors.
A clinical study presented at the AAO-SOE Joint Meeting shows that anti-VEGF therapy can effectively treat retinopathy of prematurity in premature infants, resolving abnormal blood vessels and promoting normal retinal vessel growth. The treatment has been found to be rapid, effective, and simpler than existing laser treatments.
A universal bias in visual perception affects tennis referees, leading to more incorrect calls of balls being out than in. This bias can be exploited by players, who may focus on challenging 'out' calls for an advantage.
Researchers at Massachusetts General Hospital used gene therapy to restore useful vision to mice with retinal degeneration by expressing a light-sensitive protein in other neuronal cells. The treatment showed promise, enabling the mice to find dark refuges and learn to associate light with safe platforms.
A Duke University team presents a new way to explain the puzzling flash-lag effect by suggesting that humans accumulate information from retinal speeds to make accurate behavioral choices. The study found that lag time increases non-linearly with object speed, supporting this explanation.
A European study found that blue light exposure combined with low antioxidant levels increases the risk of age-related macular degeneration (AMD) in older adults. The study recommends increasing consumption of antioxidant-rich foods and wearing protective eyewear to reduce this risk.
The study provides clues about the function of phosphodiesterase 6 (PDE6) enzyme, essential to vision. PDE6 undergoes a large conformational change after binding with small messenger molecule cGMP, affecting its ability to transmit signals to the brain.
Researchers have identified a gene variant linked to protection against age-related macular degeneration (AMD), which affects the retina and choroid layer. The study suggests that a malfunctioning innate immune system is contributing to the disease, providing potential targets for novel treatments.
Scientists have created the first genetic research model for a microscopic part of the eye that causes blindness. The new model aims to test drug compounds and therapeutic agents to prolong the life of receptor cells and delay or prevent blindness.
Researchers discover that a certain drug, known for its pain-relieving properties, can protect the retina from damage caused by diabetes. The study found that sigma receptor activation helps prevent retinal damage and vision loss.
A new experimental technique has yielded improved vision in patients with retinal degeneration, with seven of ten patients showing significant visual gains. The procedure involves transplanting fetal retinal cells along with their attached retinal pigment epithelium to replace damaged photoreceptor cells.
A new study by researchers at the Medical College of Wisconsin found that the severity of retinal hemorrhaging in young children is closely correlated with the severity of motor vehicle crashes. The study examined ten cases and found extensive retinal hemorrhages in eight patients, similar to those seen in shaken baby syndrome.
A new study reveals that short-wavelength light, like natural blue sky light, is highly effective at stimulating the human circadian system. Exposure to multiple wavelengths of light simultaneously can result in less total stimulation compared to viewing individual colors separately, a phenomenon known as spectral opponency.
A new small molecule inhibitor of Src kinases was found to eliminate VEGF-induced fluid accumulation in the retina of mice and rabbits. The approach, which involved topical application or intravenous injection, showed promise for reducing vision loss due to VEGF-mediated blood vessel permeability.