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Tag: "eyes" at biology news

Light-sensitive photoswitches could restore sight to those with macular degeneration

... Flannery, they've injected photoswitches into the eyes of rats that have a disease that kills their rods ...pplication: restoring the response to light in the eyes of people who have lost their photoreceptor cells, in particular, the rods and cones in the most sen...

Results with newer bladeless LASIK equivalent to standard microkeratome LASIK

...fter surgery, there are no differences between the eyes that had bladeless or microkeratome LASIK with res...ference in vision after three months between their eyes treated with bladeless or microkeratome LASIK. Backscatter is haziness in the cornea that is usually...

Beauty and the brain

... signals health and fitness ?unusually protuberant eyes might be a clue to disease, for example ?and so is a kind of shorthand for the value of a potential mate. But whereas that explanation makes intuitive sense when it comes to human faces, Winkielman said, it strains credulity when applied to inanim...

How does a zebrafish grow a new tail?

... treatments for people whose hearts, spinal cords, eyes or arms and legs have been badly hurt. Scientists have discovered some of the genes and cell-to-cell communication pathways that enable zebrafish to restore their tail fins. "The ability to regenerate body parts such as those that are damaged by...

Researchers add to understanding of how brain cells communicate

...nal from your hand and the visual signal from your eyes reach the brain at about the same time, forging a memory. Specifically, memory requires the coordinated activation of many types of receptors at synapses. The flow of calcium ions through a channel in NMDA receptors plays a central role. Neurons "...

Why Popeye only has eyes for spinach

Eating spinach could protect your eyes from the leading cause of blindness in western soc...nt measured and learning about the health of their eyes might be the first step to a change in lifestyle for many people." ...

U of MN researchers find novel genes critical in organ development

...ood and blood vessel development, formation of the eyes and ears, and metabolism of lipids, or fats. In addition, instead of just examining what happens with one specific gene if it is turned on or off, they were able to directly compare the effects of removing different genes on organ formation and f...

'Nymph of the sea' reveals remarkable brood

... found contains soft-part anatomy such as legs and eyes and also includes about twenty eggs, each about half a millimetre in size, and two possible juveniles. "The fossil has been christened Nymphatelina gravida, meaning' a pregnant young woman of the sea'. This remarkable discovery provides an unequiv...

Embryonic selection of sex avoids conceiving blind children

...tinosis Pigmentaria is a hereditary illness of the eyes of a degenerative nature. It causes a serious reduction in visual capacity and, in many cases, leads to blindness. The ailment does not affect males and females equally: in the case of men, there is a 50% probability of suffering the disease. With wo...

Brain regions do not communicate efficiently in adults with autism

...hile the people were seated and relaxed with their eyes closed for two minutes. The researchers found patterns of higher than normal neural connectivity in the left hemisphere, particularly in the temporal lobe of the persons with autism within two different frequencies of brain waves, the delta and ...

An artificial cornea is in sight, thanks to biomimetic hydrogels

If eyes are "the windows of the soul," corneas are the panes in those windows. They shield the eye from dust and germs. They also act as the eye's outermost lens, contributing up to 75 percent of the eye's focusing power. On Sept. 11 in San Francisco at the ...

Sea urchin genome suprisingly similar to man and may hold key to cures

Sea urchins are small and spiny, they have no eyes and they eat kelp and algae. Still, the sea creature’s genome is remarkably similar to humans?and may hold the key to preventing and curing several human diseases, according to a University of Central Florida researcher and several colleagues. UCF P...

Train your brain to hear your friends at a party

...Irving said: "When we switch on a bright light our eyes detect the increase in light levels and the brain sends a message to the eye to tell it to contract the pupil and let in less light. This is a feedback system where the brain is getting information from the eye about its surroundings, processing that...

Transplanted photoreceptor precursor cells restore visual function in mice with retinal degeneration

...sing cells called photoreceptors directly into the eyes of mice and restored their visual function. The achievement is based on a novel technology in which the cells are introduced at a particular stage in their development. It was carried out at the London Institute of Ophthalmology using a novel appr...

Two nerve cells in direct contact

...low fields that the movement information from both eyes is merged so that the whole flow field can be asse...bining the movement signals from both the facetted eyes of a fly. In the blow fly, the nerve cells that analyse optical flow fields, called tangential cel...

Compound eyes, evolutionary ties

...that the presence of a key protein in the compound eyes of the fruit fly (which glow at center due to a fl...this protein, called "spacemaker," can convert the eyes of fruitflies--which normally have open eye systems--into a closed one. In contrast, the introductio...

Mutant gene causes severe kidney disease in infants

...n too much water, which causes swelling around the eyes and throughout the body. Some types of nephrotic syndrome can be treated with steroids or other drugs, but steroid-resistant forms of the disease as a rule do not respond to treatment. Untreated nephrotic syndrome often causes severe scarring and ...

St. Jude announces breakthrough in eye cancer treatment

...ge to physicians, who are reluctant to remove both eyes from young children, said Matthew Wilson, M.D., a ...ical institutions generally save 70 percent of all eyes treated, even in the case of advanced disease." ...

Huddling and a drop in metabolism allow penguins to survive the South Pole cold

...ring tight huddles, birds were observed with their eyes closed. It is known that the proportion of sleep increases during the fast of emperor penguins, and that sleep is associated in penguins with an eight percent drop in metabolic rate. Conclusions The findings suggest that tight huddling allow...

Human preference for other species could determine whether they survive

...retention of babyish physical traits such as large eyes and large head ?also can play major roles for some animals. Pandas, zebras and elephants, for example, are black and white or gray but are highly preferred by humans. Millions of insects and the countless slimy invertebrates that occupy the oceans ar...

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