Articles tagged with Retina
KAUST researchers develop an artificial electronic retina that mimics human vision and recognizes handwritten numbers with high accuracy. The retina uses perovskite nanocrystals to detect light intensity via capacitive change, offering a more energy-efficient alternative to existing systems.
Researchers from University of Otago hope to identify Alzheimer's risk in middle age with a simple eye test. Thinner retinal nerve fibre layer and ganglion cell layer are linked to cognitive decline, suggesting optical scans could aid diagnosis.
Researchers at CRCHUM have identified damaged nanotubes connecting pericytes as a major contributor to glaucoma. The study reveals that restoring calcium equilibrium within pericytes can recover vascular and neuronal functions, paving the way for new therapeutic approaches.
Researchers at UCI discovered that AdipoR1 protein deficiency leads to ceramide accumulation in the retina, causing progressive photoreceptor cell death. A pharmacological treatment combining desipramine and L-cycloserine reduced ceramide levels, protecting photoreceptors and improving vision.
Researchers at RIKEN have developed a new retinal transplant technique by engineering human-derived retina sheets to lose bipolar cells, allowing better connections to host retinas and improved responses to light. The technique has shown substantial functional improvement in animal studies and is now poised for human clinical trials.
A new AI-based method has been developed to evaluate patients with Stargardt disease, a leading cause of childhood blindness. The study found that the severity of vision loss can be classified into different phenotypes based on genetic variants, and provided sensitive structural outcome measures for therapeutic trials.
Researchers developed an AI system that can analyze retinal scans to identify patients at high risk of a heart attack over the next year. The system uses deep learning techniques and achieves an accuracy of 70-80%, revolutionizing the way patients are screened for signs of heart disease.
A Bar-Ilan University study found that participants remembered large images 1.5 times more than small ones, regardless of detail or resolution. This phenomenon may affect screen quality and learning on smartphones, suggesting larger screens could be better for studying.
Researchers found that a third of patients with wet age-related macular degeneration can safely stop eye injection therapy without further vision loss. Patients who stopped treatment showed better visual acuity, gain of vision, and less fluid in their retina compared to those requiring continued injections.
Research finds a strong association between retinal age and real age, with large gaps associated with increased mortality risk. The 'retinal age gap' could be used as a screening tool to predict mortality risk, particularly for non-cardiovascular causes.
Scientists at St. Jude Children's Research Hospital identified a 'modular' super-enhancer that controls gene expression during retina formation, revealing four distinct regions with different functions. This discovery provides a way to study gene expression during development and offers a blueprint for studying brain development.
Researchers at WVU are studying the Musashi proteins to understand their role in retinal degeneration and develop a universal therapy. By investigating protein translation and gene suppression, they hope to identify potential pathways to boost protein production and slow vision loss.
The Nixon Visions Foundation has given a significant gift to support studies of the PRPH2 gene linked to macular dystrophy and boost stem cell research aimed at developing early diagnosis and a cure for this devastating genetic eye disease. Researchers hope to make a tremendous impact on people with this inherited eye disease.
Researchers have found that people with genetic risk factors for age-related macular degeneration (AMD) have thinner retinas and photoreceptors, even if they haven't yet lost their sight. This early detection could lead to earlier treatment and lifestyle changes to prevent vision loss.
Microglia, the brain's immune cells, migrate to the retina using blood vessels as pathways and require neurogenesis for colonization. The study provides insights into microglial migration and its implications for neurodegenerative diseases.
A team of Australian researchers has made significant breakthroughs in understanding the benefits of exercise on retinal health and function. By identifying unique molecular signals, they aim to develop a supplement that can harness these benefits for patients who are unable to engage in physical activity.
Researchers found that three minutes of morning exposure to 670nm deep red light improved color contrast vision by 17% and the effects lasted for at least a week. The study built on previous findings that daily longwave deep red light exposure boosts energy-producing mitochondria cells in the retina.
Researchers have discovered that a low-dose oral compound, HBI-002, can safely reduce oxidative stress and inflammation in the retina, common causes of diabetic retinopathy. The study suggests that small amounts of carbon monoxide may help protect vision in diabetes patients.
A team of scientists at the University of Utah has discovered a new type of interneuron in the mammalian retina called the Campana cell. The discovery marks a notable development for the field, as scientists work toward a better understanding of the central nervous system by identifying all classes of neurons and their connections.
A novel computational platform called scAAVengr uses single-cell RNA sequencing to quickly evaluate viral vectors for delivering gene therapies to the retina with maximum efficiency and precision. This approach saves time and resources by identifying suitable candidates that can deliver therapy to affected parts of the retina accurately.
A new study reveals that non-mammalian vertebrates may have an efficient way of deciphering between color and greyscale information. Zebrafish were found to use four types of cone-photoreceptors, which respond to different wavelengths, to distinguish color in a simpler manner than humans.
The living retina achieves sensitivity and efficiency that human engineers can only dream about, with optimized mosaics of different sensitivities parsing 40 visual features. The retinas adapt to current conditions and conserve energy by tuning out noise, making them orders of magnitude less power-hungry than smartphone sensors.
Researchers have successfully cultivated complex retinal tissue from embryonic stem cells of medaka and zebrafish. The study, published in eLife, demonstrates the feasibility of growing retina-like structures in a Petri dish, offering new insights into retinal development and potential applications for human medicine.
A new study from University of California - San Diego suggests that protein deposits in the retina and brain may be a sign of Alzheimer's disease risk. Retinal imaging may potentially serve as an early biomarker for detecting AD risk, offering a non-invasive alternative to traditional brain scans.
Researchers at University of Bonn found that fixing objects slightly away from the center of cone density improves overall vision. The observed image shift is due to the varying resolution across the human retina, with sharper areas in the fovea and less sharp areas in the periphery.
Researchers discover presumed SARS-CoV-2 viral particles in the human retina of COVID-19 patients. The finding suggests a possible link between the virus and ocular clinical manifestations, highlighting the need for further investigation into the virus's effects on the eyes.
Before birth, neonatal mice's retinas generate spontaneous patterns of activity that simulate optic flow, training the brain to process directional information. This intrinsic mechanism prepares the visual system for motion detection at eye opening, despite the mouse not being able to see yet.
Researchers developed an open-source camera to capture mice's view in their natural environments. The study reveals that mice have adapted to perceive colors in the green and ultraviolet regions to aid survival and reproduction.
Scientists from the Netherlands Institute for Neuroscience found that mice have a region called 'focea' with improved visual sensitivity, similar to the fovea in human retinas. This discovery suggests that mice may be better models for studying human vision than previously thought.
Researchers from Universidad Complutense de Madrid have developed a method to measure the roughness of retinal layers, which indicates the early stages of Alzheimer's disease. The study uses fractal dimension analysis and can be used for quick and low-cost testing.
Researchers have determined how peptides derived from PEDF protect neuronal cells in the retina layer, which could lead to treatments for degenerative retinal diseases such as age-related macular degeneration. The study found that these peptides work by binding to a protein receptor and processing omega-3 fatty acids like DHA.
Researchers at Dartmouth College discovered that the brain uses a 'steadycam' strategy to stabilize visual experience, perceiving frames as stationary even when they're clearly moving. This 'paradoxical stabilization' effect creates the illusion of stable images, similar to how our brains discount motion in everyday life.
The research team found that tenascin-C plays a crucial role in damaging vision cells following ischaemia. In mice without tenascin-C, retinal function improved after ischaemic damage, and fewer photoreceptors died.
A device created by Dr Matthew Griffith uses absorbed light to fire neurons transmitting signals from the eyes to the brain, acting as an artificial retina for those with lost capacity. The goal is to provide a biomedical solution to vision impairment caused by retinitis pigmentosa and AMD.
Researchers developed a novel medical device using octopus vision technology to assess macular pigment levels, enabling optometrists to provide preventative advice to patients. The technology can screen people from 5-95 years of age for low macular pigments, a strong risk factor for macular degeneration.
Researchers from UNIGE used mice to study the complex processing of light by the retina, revealing that both light intensity and its temporal shape influence the signal sent to the brain. The findings, published in Science Advances, may lead to new diagnostic and therapeutic possibilities for eye weaknesses.
A minimally invasive retinal reattachment procedure using pneumatic retinopexy leads to better long-term integrity of photoreceptors compared to more invasive procedures. This technique achieves superior visual outcomes by allowing the retina to reattach naturally and minimize damage to critical cells.
Researchers at UW-Madison have developed a micro-molded scaffolding photoreceptor patch to deliver new photoreceptors to damaged or diseased retinas. The 'ice cube tray' scaffold can hold three times as many cells while reducing biomaterial usage.
Researchers at the University of Rochester have developed a 3D lab model mimicking the human retina affected by age-related macular degeneration. The model combines patient-derived tissues with bioengineered synthetic materials, allowing for targeted drug therapies and potential individual treatments.
Researchers studied stress signals in skeletal muscle and found they prevent misfolded protein aggregates in the brain and retina. Tailoring this signaling may help combat neurodegenerative conditions like age-related dementia and Alzheimer's disease.
A NIH-led team has noninvasively visualized photoreceptors in the retina with greater detail than ever before, improving resolution by a third. This breakthrough technique enables better tracking of degenerative changes and may lead to earlier detection and treatment of vision loss diseases.
A recent study published in IEEE Transactions on Neural Systems and Rehabilitation Engineering found that high signal heterogeneity from different retinal ganglion cells is essential for efficient transmission of visual information. The research team discovered that certain types of retinal ganglion cells respond similarly to electric ...
A new study reveals that the CLN3 gene mutation associated with Batten disease leads to degeneration of light-sensing photoreceptor cells in the retina. This understanding is crucial for developing new therapeutic strategies, including gene therapies and cell transplantation.
Researchers found that medicated drops can close small macular holes within two to eight weeks, allowing some patients to avoid surgery. The treatment was most effective for patients with holes less than 200 micrometers in diameter, and showed promise as an alternative to traditional vitrectomy surgery.
Researchers successfully transplanted human cadaver-derived retinal pigment epithelium (RPE) into non-human primate models, showing promise for treating macular degeneration and blindness. The study demonstrates the safety and feasibility of this approach, paving the way for potential human clinical trials.
Researchers found that removing the internal limiting membrane can help transplanted retinal cells integrate into the retina, improving vision loss caused by glaucoma and other diseases. The study aims to develop new ways to repair or replace lost optic neurons by growing new cells.
A study found associations between retinal changes and memory problems in older people with type 1 diabetes. Researchers used routine eye scans to detect structural changes in the retina that may be linked to cognitive decline. The findings could lead to better understanding, diagnosis, and treatment of Alzheimer's disease and other co...
A new study decodes the molecular diversity of neurons in the zebrafish retina, identifying at least 32 different types of retinal ganglion cells. These cell types are linked to specific functions and behaviors, shedding light on how the brain processes visual stimuli.
Researchers created a biohybrid artificial retina with silk fibroin and retinal cells, which can adhere to the eye's surface and facilitate integration. The new technology holds promise for treating Age-Related Macular Degeneration (AMD), an incurable disease affecting over 196 million people worldwide.
Scientists at the University of Southampton have made a breakthrough in reconstructing eye tissues from the outer retina using serial block face scanning electron microscopy. The study provides a clear picture of the 3D organisation of the retinal pigment epithelium, which could help understand causes of damage leading to sight loss.
Researchers at the University of Barcelona have identified a new function of the ataxin 3 gene, which causes Machado-Joseph disease, in the development of retina photoreceptors. This discovery provides insights into the molecular causes of rare diseases like ataxia and macular degeneration.
A study published in Science Advances reveals a genetic program essential for 3D vision and motor coordination in mice. The discovery sheds light on the regulation of the Wnt signaling pathway by Zic2, which is crucial for bilateralism and has implications for understanding pathologies such as spina bifida.
A study found a high prevalence of type 2 diabetes (60.5%) among the Xavante population, with severe cases threatening sight. The researchers used a portable retinograph to detect diabetic retinopathy and found 16 cases, highlighting the need for screening in remote communities.
A label-free imaging technique has been developed to examine immune cells called macrophages in the retina of healthy humans and patients with glaucoma. Cell density decreased with age in healthy participants, while cell processes moved more quickly and covered a smaller area in patients.
Scientists at Scripps Research Institute have uncovered a potential new strategy for treating eye diseases, including age-related macular degeneration and diabetic retinopathy. A fragment of the protein CITED2 has been shown to reduce neovascularization while preserving healthy blood vessels in mouse models.
The study reveals new details on how the retina works and photoreceptors convert light into nerve signals. Spontaneous calcium flares were discovered in the tips of the outer segment, indicating a functional gradient and a need for turnover.
A new gene therapy using a novel light-sensing protein has restored significant retinal function and vision in blind mice. The therapy involves attaching the MCO1 opsin to retina bipolar cells using gene therapy, allowing treated mice to navigate mazes and detect changes in motion faster than untreated mice.
New research suggests neural implants need to filter out correlated noise in retinal cells to achieve accurate signals, improving performance by 20-100% depending on light conditions
Researchers created a comprehensive single-cell transcriptome atlas of the human retina's aging process. The study reveals regional and cell-type specific differences in gene expression associated with various age-related diseases.
Scientists have created a model that replicates the progression of age-related macular degeneration (AMD), a disease with no current treatment. By understanding how RPE cells respond to stress and changes in gene expression, researchers can now test potential therapeutics for dry AMD.