DEC 09, 2014 12:00 AM PST

Tel Aviv University reports progress toward synthetic, wireless retinas

The aging process affects everything from cardiovascular function to memory to sexuality. Most worrisome for many, however, is the potential loss of eyesight because of retinal degeneration.

New progress towards a prosthetic retina could help alleviate conditions that result from problems with this vital part of the eye. An encouraging new study published in Nano Letters describes a novel device, tested on animal-derived retinal models, that has the potential to treat a number of eye diseases. The proof-of-concept artificial retina was developed by an international team led by Prof. Yael Hanein of Tel Aviv University's School of Electrical Engineering and head of TAU's Center for Nanoscience and Nanotechnology and including researchers from TAU, the Hebrew University of Jerusalem and Newcastle University.

"Compared to the technologies tested in the past, this new device is more efficient, more flexible, and can stimulate neurons more effectively," said Prof. Hanein. "The new prosthetic is compact, unlike previous designs that used wires or metals while attempting to sense light. Additionally, the new material is capable of higher spatial resolution, whereas older designs struggled in this area."

The researchers combined semiconductor nanorods and carbon nanotubes to create a wireless, light-sensitive, flexible film that could potentially replace a damaged retina. The researchers tested the new device with chick retinas that were not yet light sensitive to prove that the artificial retina is able to induce neuronal activity in response to light.

Patients with age-related macular degeneration (AMD), which usually affects people age 60 or older who have damage to a specific part of the retina, will stand to benefit from the nanotube device if it is proved compatible in animals over the long term.

According to TAU doctoral student and research team member Dr. Lilach Bareket, there are already medical devices that attempt to treat visual impairment by sending sensory signals to the brain. While scientists are trying different approaches to develop an implant that can "see" light and send visual signals to a person's brain, to counter the effects of AMD and related vision disorders, many of these approaches require the use of metallic parts and cumbersome wiring or result in low resolution images. The researchers set out to make a more compact device.

"In comparison with other technologies, our new material is more durable, flexible, and efficient, as well as better able to stimulate neurons," said Prof. Hanein. "We hope our carbon nanotube and semiconductor nanorod film will serve as a compact replacement for damaged retinas."

"We are still far away from actually replacing the damaged retina," said Dr. Bareket. "But we have now demonstrated that this new material stimulates neurons efficiently and wirelessly with light. If you compare this to other devices based on silicon technology, which require wiring to outside energy or light sources, this is a groundbreaking new direction."

The research team received funding for their study from the Israel Ministry of Science and Technology, the European Research Council and the Biotechnology and Biological Sciences Research Council.
About the Author
  • Ilene Schneider is the owner of Schneider the Writer, a firm that provides communications for health care, high technology and service enterprises. Her specialties include public relations, media relations, advertising, journalistic writing, editing, grant writing and corporate creativity consulting services. Prior to starting her own business in 1985, Ilene was editor of the Cleveland edition of TV Guide, associate editor of School Product News (Penton Publishing) and senior public relations representative at Beckman Instruments, Inc. She was profiled in a book, How to Open and Operate a Home-Based Writing Business and listed in Who's Who of American Women, Who's Who in Advertising and Who's Who in Media and Communications. She was the recipient of the Women in Communications, Inc. Clarion Award in advertising. A graduate of the University of Pennsylvania, Ilene and her family have lived in Irvine, California, since 1978.
You May Also Like
SEP 21, 2018
Clinical & Molecular DX
SEP 21, 2018
We will teach you to be a doctor, said us to the machine.
Clinical diagnosis are now possible in the hands of computers through machine learning. Whence, the reports of successful trials for the diagnostics....
OCT 07, 2018
Technology
OCT 07, 2018
Multi-Robotic Technology Offers Synchronized 3D-Printing
In Nanyang Technological University, Singapore (NTU Singapore), researchers created technology that can allow two robots to work in unison to 3D-print a co...
OCT 24, 2018
Technology
OCT 24, 2018
App Alleviates Symptoms of OCD
Researchers at the University of Cambridge have developed a 'brain training' app that may help people who suffer from obsessive-compulsive disorder...
OCT 28, 2018
Technology
OCT 28, 2018
Worlds Smallest Gyroscope
What do vehicles, drones and wearable/handheld devices have in common? They all utilize gyroscopes in determining their orientation in three-dimensional sp...
OCT 28, 2018
Technology
OCT 28, 2018
Driverless Car Technology?
Can you imagine a daily-commute that is chaotic free? Organized and ordered? Well, connected and automated vehicles can someday make such imagination true...
NOV 28, 2018
Space & Astronomy
NOV 28, 2018
NASA Lucy Mission to Visit Jupiter's Trojan Asteroids is Poised to Launch in 2021
Why are we here, and where did we come from? Humankind has been asking these questions since the dawn of time, but legitimate answers appear to be highly e...
Loading Comments...