Bird observatories all over the world may benefit from a newly designed high-resolution imaging system used to study the retinal structure of live birds of prey. In a recently published Investigative Ophthalmology & Visual Science article, researchers reveal unprecedented three-dimensional information about the retina of four species of raptors — two hawks and two owls — using the non-invasive, powerful imaging tool.
Through a series of experiments conducted at Bascom Palmer Eye Institute at the University of Miami, the research team used the new spectral-domain optical coherence tomography (SD-OCT) system to test its potential for vision research in birds of prey. The resulting images show detailed retinal anatomy that is not widely known, such as the retina layers and the structure of the deep and shallow foveae, the tiny pit located in the light-sensitive retina that provides the clearest vision of all. Traumatic injury to one bird’s retina was also successfully imaged.
Although OCT has been used to image retinas in animals, the authors report that this the first time high resolution imaging has been used for living, awake birds, which provides an abundance of images with microscopic detail without harming the birds.
“Previous anatomical studies of raptor foveae required examination of the retina with a microscope, limiting the number of birds that could be studied,” said author Robert W. Knighton, PhD, retired research professor at Bascom Palmer Eye Institute.
Lead researchers Marco Ruggeri and Shuliang Jiao and their colleagues suggest that the results of this research point the way for other scientists to study the eye structure and vision of large birds, including those that compare retinal anatomy differences between birds of prey that hunt during the day and those that hunt at night.
“One can imagine that obtaining data with an SD-OCT scanner could become a routine procedure at the many bird observatories in the world,” adds Knighton, who now lives near Hawk Ridge Bird Observatory in Duluth, Minn.
The Association for Research in Vision and Ophthalmology (ARVO) is the largest eye and vision research organization in the world. Members include some 12,500 eye and vision researchers from over 80 countries. The Association encourages and assists research, training, publication and dissemination of knowledge in vision and ophthalmology. For more information, visit www.arvo.org.
The ARVO peer-reviewed journal Investigative Ophthalmology & Visual Science (IOVS) publishes results from original hypothesis-based clinical and laboratory research studies. IOVS ranks No. 4 in Impact Factor among ophthalmology journals. It is published monthly online.
Katrina Norfleet | Newswise Science News
WAKE-UP provides new treatment option for stroke patients | International study led by UKE
17.05.2018 | Universitätsklinikum Hamburg-Eppendorf
First form of therapy for childhood dementia CLN2 developed
25.04.2018 | Universitätsklinikum Hamburg-Eppendorf
At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.
At this year's LASYS, the LZH will exhibit light-based processes such as cutting, welding, ablation and structuring as well as additive manufacturing for...
There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?
At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...
So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics
Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...
The historic first detection of gravitational waves from colliding black holes far outside our galaxy opened a new window to understanding the universe. A...
A team led by Austrian experimental physicist Rainer Blatt has succeeded in characterizing the quantum entanglement of two spatially separated atoms by observing their light emission. This fundamental demonstration could lead to the development of highly sensitive optical gradiometers for the precise measurement of the gravitational field or the earth's magnetic field.
The age of quantum technology has long been heralded. Decades of research into the quantum world have led to the development of methods that make it possible...
02.05.2018 | Event News
13.04.2018 | Event News
12.04.2018 | Event News
22.05.2018 | Life Sciences
22.05.2018 | Earth Sciences
22.05.2018 | Trade Fair News