Navigation Links
New Vision Device Passes Virtual Collision Test for People with Tunnel Vision
Date:8/31/2009

BOSTON, Aug. 31 /PRNewswire/ -- A high-tech device that expands the visual field of patients with tunnel vision has passed a collision test in a walking simulator, according to scientists at Schepens Eye Research Institute, in a study published in the September issue of Investigative Ophthalmology and Visual Science. The study found that patients wearing this innovative device, consisting of a tiny camera, pocket-sized computer and a transparent computer display on a pair of glasses, were able to correctly judge potential collisions when "walking" in a virtual shopping mall. (Incorrect judgment could result in over reaction and actually contribute to an accident.)

"This is additional evidence that these glasses can help people with this debilitating condition," says Dr. Eli Peli, who invented them several years ago and has been testing and refining them ever since.

In previous research, Peli and his team found that the glasses significantly improved a person's ability to detect objects not in his/her visual field. The current study is the first to test the glasses while a person is in a potential collision situation.

Approximately one in 50 Americans over age 40 suffers from an eye disease, such as glaucoma or retinitis pigmentosa, that can lead to tunnel vision. Tunnel vision occurs when peripheral or side vision is destroyed, leaving only a small window of central vision. Tunnel vision can often cause the individual to bump into or trip over obstacles. "Navigating city streets or buildings can be quite challenging," says Dr. Peli.

To deal with tunnel vision, patients have relied on long canes to warn them of obstacles just in front of them. Glasses that act as reverse binoculars, miniaturizing and pulling in the missing parts of their visual field, have been tried in the past, but made things so small that detailed visual information is sacrificed.

With Peli's glasses, the transparent display allows patients to retain their ability to see detailed visual information, while also viewing a superimposed minified outline version of a wider visual field. The tiny computer-video system provides updated outline information 30 times per second. When a patient becomes aware of a possible obstacle or important object in the superimposed outline image, he/she can avoid bumping into or tripping over it.

Because the minified outline can strongly distort perception of distance and obstacle location, and only provides coarse information about the scene, Peli and his team wanted to know if patients were able to use the device to make correct judgments about potential collisions. They tested normally sighted subjects and tunnel vision patients in a large virtual mall environment that presented a series of collision scenarios -- people and objects appearing from different distances and directions. They asked the subjects to estimate the risk of collision in these scenarios with and without wearing the tunnel vision device.

The team found that, even without any adaptation or training, all tested subjects were able to make decisions using the device as accurately as when directly looking at obstacles with natural vision. The distortion of minification did not seem to affect their judgment.

The research team, which includes Dr. Gang Luo and Dr. Russell L. Woods, says that the next step is to refine the device and evaluate its utility in patients' daily life.

"From this study, we had an idea about how we could make an intelligent collision detection system. We have started to develop such a system that can automatically provide warnings about potential collisions. It can help patients with tunnel vision, as well as completely blind people," says Dr. Luo.

Schepens Eye Research Institute is the largest independent eye research institute in the nation and an affiliate of Harvard Medical School.


'/>"/>
SOURCE Schepens Eye Research Institute
Copyright©2009 PR Newswire.
All rights reserved

Related biology technology :

1. PharmaTelevision Launches the First Daily News Show for the Life Sciences Industry
2. Trusted LASIK Surgeons Welcomes Fort Lauderdale Vision Correction Surgery Expert Raymond P. Gailitis, M.D., F.A.C.S.
3. One of the Nation's Leading Analytical Testing Laboratories is Now Easier to Access -- Pace Analytical Launches New Web Site to Showcase Its Three Business Divisions
4. Seasoned Dermatologist Nissan Pilest of Irvine, CA, Joins SDS Clinical Trials as Clinical Investigator for Dermatology Division
5. Environmental Tectonics Corporation Announces Promotion of Don R. Webber to VP of Sales for their BioMedical Division
6. avVaa World Health Care Products, Inc. Announces Engagement of Koeppel Direct for their DRTV-Direct Response Television Media Buying Campaign
7. Television News Segment Featuring Pyratine XR to Air to 18 Million + Households on DIRECTV NewsCluster
8. Environmental Tectonics Corporations BioMedical Division to Exhibit at Undersea and Hyperbaric Medical Society Meeting
9. Environmental Tectonics Corporations BioMedical Division Achieves Foreign Manufacturer Accreditation in Japan
10. Innocoll Announces Provisional Findings From Its Three Phase 2 Clinical Trials Investigating CollaRx(R) GENTAMICIN TOPICAL for the Treatment and Prevention of Diabetic Foot Infections
11. Leading for Growth in the New Economic Reality Includes Vision and Innovation
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/23/2017)... ... May 22, 2017 , ... A new ... San Diego, California, this August will feature high-level speakers on quantum devices, graphene ... SPIE Optics and Photonics, the largest multidisciplinary optical sciences meeting in North America, ...
(Date:5/23/2017)... ... May 23, 2017 , ... Energetiq Technology, a world ... facility expansion to accommodate its rapid growth. , The renovations at the company’s ... of the existing areas. The expansion includes, a state-of-the-art engineering facility, and a ...
(Date:5/23/2017)... ... ... Bacterial biofilms, surface adherent communities of bacteria that are encased in a ... and catheter infections to gum disease and the rejection of medical implants. Though ... year, there is currently a paucity of means for preventing their formation or treating ...
(Date:5/23/2017)... ... May 23, 2017 , ... ... to re-engineer their control technology again and again. METTLER TOLEDO has released two ... manufacturers. The videos illustrate how integration of the ACT350 into Siemens and Allen ...
Breaking Biology Technology:
(Date:4/24/2017)... , April 24, 2017 Janice ... partner with  Identity Strategy Partners, LLP (IdSP) , ... or without President Trump,s March 6, 2017 ... Entry , refugee vetting can be instilled with greater ... (Right now, all refugee applications are suspended by ...
(Date:4/13/2017)... 13, 2017 UBM,s Advanced Design and Manufacturing ... feature emerging and evolving technology through its 3D Printing ... run alongside the expo portion of the event and ... demonstrations focused on trending topics within 3D printing and ... manufacturing event will take place June 13-15, 2017 at the ...
(Date:4/11/2017)... No two people are believed to ... York University Tandon School of Engineering and Michigan ... partial similarities between prints are common enough that ... and other electronic devices can be more vulnerable ... in the fact that fingerprint-based authentication systems feature ...
Breaking Biology News(10 mins):