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Gold beads show previously unseen parts of the eye
May 01, 2006Rockville, Md. - A new study recently published in Journal of Vision, an online, free access publication of the Association for Research in Vision and Ophthalmology (ARVO), shows that gold beads injected into eye tissue can be used to obtain images of important structures in the orbit that cannot be seen with Magnetic Resonance Imaging (MRI) or other imaging methods.
Researchers from the Smith-Kettlewell Eye Research Institute in San Francisco, Calif., injected tiny gold beads into various areas in the eye which are usually difficult to visualize. The implanted beads were then imaged using a digital dental-type X-ray system and 3-dimensional reconstruction techniques. The study showed that three-quarters of the implanted beads remained where injected over a six-month period, and revealed movements of muscle and connective tissue that figure importantly in understanding how the brain controls eye movements.
"The surprising stability of gold beads in highly mobile eye tissues means that the method can be used to visualize very slow phenomena, such as those related to growth, as well as fast phenomena, such as those related to eye movement," said Joel M. Miller, PhD, lead researcher of the study.
Association for Research in Vision and Ophthalmology
Association for Research in Vision and Ophthalmology
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Saliva proteins change as women age
In a step toward using human saliva to tell whether those stiff joints, memory lapses, and other telltale signs of aging are normal or red flags for disease, scientists are describing how the protein content of women's saliva change with advancing age.
Study finds many people with hemianopia have difficulty detecting pedestrians while driving, advocates for individual testing
Schepens Eye Research Institute scientists have found that--when tested in a driving simulator--patients with hemianopia (blindness in one half of the visual field in both eyes) have significantly more difficulty detecting pedestrians (on their blind side) than normally sighted people.
New paper describes connections between Circadian and metabolic systems
A paper by University of Notre Dame biologist Giles Duffield and a team of researchers offers new insights into a gene that plays a key role in modulating the body's Circadian system and may also simultaneously modulate its metabolic system.
Faulty body clock may make kids bipolar
Malfunctioning circadian clock genes may be responsible for bipolar disorder in children. Researchers writing in the open access journal BMC Psychiatry found four versions of the regulatory gene RORB that were associated with pediatric bipolar disorder.
Vibrations key to efficiency of green fluorescent protein
University of California, Berkeley, chemists have discovered the secret to the success of a jellyfish protein whose green glow has made it the darling of biologists and the subject of the 2008 Nobel Prize in Physiology or Medicine.
Texas Children's discharges first pediatric patient with implanted mechanical heart device
Texas Children's Hospital is the nation's first pediatric hospital to discharge a child while on an intracorporeal ventricular assist device (VAD), a feat previously accomplished only at adult institutions.
Children with autism show slower pupil responses, MU study finds
Autism affects 1 in 150 children today, making it more common than childhood cancer, juvenile diabetes and pediatric AIDS combined.
A motley collection of boneworms
It sounds like a classic horror story-eyeless, mouthless worms lurk in the dark, settling onto dead animals and sending out green "roots" to devour their bones.
Antarctica glacier retreat creates new carbon dioxide store
Large blooms of tiny marine plants called phytoplankton are flourishing in areas of open water left exposed by the recent and rapid melting of ice shelves and glaciers around the Antarctic Peninsula.
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