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Tag: "retina" at biology news

Researchers discover way to make cells in the eye sensitive to light

...nd cones are destroyed, but therest of the eye and retina remains intact. By switching on themelanopsin it could be possible to restore the eyes ability to respondto light.Although making cells in the eye responsive to light is not a cure forblindness, the team are collaborating with engineers from Imperial...

Emory Eye Center Implants Its First Retinal Chips In Patients With Retinitis Pigmentosa

...ionics Corporation involving the implantation of a retina mircrochip has allowed Emory Eye Center and the At...vision and finally blindness. At Emory Eye Center retina specialists Thomas M. Aaberg, Sr. and Jiong Yan performed the surgery recently on five patients. Ano...

Ophthalmologists Use Artificial Silicon Retina Microchip To Treat Vision Loss

...h saline. They then make a pinpoint opening in the retina through which they inject fluid to lift up a portion of the retina from the back of the eye, creating a small pocket in the "subretinal space" just wide enough to acco...

Ophthalmologists implant five patients with artificial silicon retina microchip

...h saline. They then make a pinpoint opening in the retina through which they inject fluid to lift up a portion of the retina from the back of the eye, creating a small pocket in the "subretinal space" just wide enough to acco...

Brain May Be Less Plastic Than Hoped

... for seven and one-half months after injury to the retina of adult monkeys. They found limited reorganizatio...pots on the same sides of the field of vision. The retina sends signals that the brain interprets as light, color, or objects. Each section of the retina corr...

Scientists generate patient-specific stem cells, Science study says

...nto cells that display characteristics of skin and retina cells, muscle cell bundles, bone matrix cells and cells of the gastrointestinal and respiratory lining. One of the next preclinical steps, according to the authors, is to evaluate, in the lab, differentiated patient-specific human embryonic stem cel...

SuperLigands - a database of ligand structures derived from the Protein Data Bank

...nto cells that display characteristics of skin and retina cells, muscle cell bundles, bone matrix cells and cells of the gastrointestinal and respiratory lining. One of the next preclinical steps, according to the authors, is to evaluate, in the lab, differentiated patient-specific human embryonic stem cel...

Genetic links could unlock clues to leading cause of blindness

...develops when a small, light-detecting part of the retina called the macula breaks down. Seven million more Americans have an intermediate form of the disease, and millions more are expected to develop it within the next 15 years. The disease causes nodule-like specks to build up in the eye, chipping away ...

Blink, and the brain misses it

...he face, the fibre could be used to illuminate the retina through the roof of the mouth. Therefore, the amount of light falling on the retina remained constant, even when the volunteers blinked. The researchers then performed a type of brain ...

Scientists focus on 'dwarf eye'

...ng layer of cells at the back of the eye. Once the retina is the right distance from the lens for proper foc...r by the gene. In people with this condition, the retina is too close to the lens, but the lens and cornea, the eye's outermost layer, are of normal size and...

Retina adapts to seek the unexpected, ignore the commonplace

...at Harvard University have found evidence that the retina actively seeks novel features in the visual enviro...o the brain, but not very faithfully. Instead, the retina creates a cartoonist's sketch of the visual scene, highlighting key features while suppressing the l...

UCLA researchers identify key enzyme linked to childhood blindness

...he regeneration of rhodopsin visual pigment in the retina after light exposure. Rhodopsin contains a light absorbing molecule called 11 cis retinaldehyde, related to vitamin A, which is converted upon light absorption to all trans retinaldehyde in a process called photo bleaching. This conversion is the fir...

Color perception is not in the eye of the beholder: It's in the brain

...t the number of color-sensitive cones in the human retina differs dramatically among people--by up to 40 tim...e technique allows researchers to study the living retina in ways that were never before possible. The pigment that allows each cone in the human eye to react...

Scientists and engineers apply nature's design to human problems

... Engineering Minami Yoda is developing an auditory retina based on the fish ear. School of Materials Science and Engineering Professor Ken Sandhage and School of Chemistry and Biochemistry Assistant Professor Nils Kr�ger explore nanostructure synthesis via the self-assembled, biomineralized template --...

Gene therapy works in mice to prevent blindness that strikes boys

...ften with devastating results. What happens is the retina actually begins to split in the middle, causing lo..., the protein appears capable of moving within the retina to its target sites and the beneficial changes appear to be long lasting, researchers said. Especial...

Fruit fly's beating heart helps identify human heart disease genes

...h is commonly used to measure the thickness of the retina in the eye, to obtain detailed images of the beating heart of an adult, unanesthetized fly. "After inserting into the fly the gene that we know is implicated in dilated cardiomyopathy in humans, we imaged the adult fly with this novel system and wha...

Lizard 'third eye' sheds light on evolution of color vision

...one cells are compared by other nerve cells in the retina as well as the brain. The lizard's parietal eye photoreceptors contain two pigments per cell, blue and green. Having two different pigments allows the cell to respond to two different colors of light and process that information within the same cel...

'Prosthetic' retinal cells let blind mice see light

...ve the introduction of tissues or devices into the retina and, therefore, may largely avoid the complications of immune reactions and biocompability," wrote the researchers. "In addition, it could potentially achieve high spatial resolution for the restored 'vision' because the approach targets the cellular...

MIT 'seeing machine' offers hope to blind

...ne they projected a simple image directly onto the retina of one eye, past the hemorrhages within the eye th... idea was to determine whether she had any healthy retina left. It turns out that she did, and was able to see the image - a stick figure of a turtle. But th...

Scientists discover why cornea is transparent and free of blood vessels, allowing vision

...y of the cornea that allows light to pass onto the retina and from there to the brain for interpretation. When the cornea is clouded by injury, infection or abnormal blood vessel growth, vision is severely impaired, if not destroyed. Scientists have been wrestling with the "clarity" puzzle for many decade...

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