Navigation Links
Telescope embedded in glasses lens promises to make driving easier for visually impaired
Date:7/24/2008

Glasses embedded with a telescope promise to make it easier for people with impaired vision to drive and do other activities requiring sharper distance vision. Schepens Eye Research Institute scientists describe the advantages of these innovative glasses over earlier devices in an article published in the May/June issue of Journal of Biomedical Optics, mailed in print form to subscribers this month.

"This new design has several advantages," says the inventor of the glasses, Dr. Eli Peli, who is a senior scientist at Schepens Eye Research Institute, a professor at Harvard Medical School, a low vision expert, and the senior author of the paper. "One major advantage is the appearance of the glasses. Because they look almost like normal everyday spectacles, it is more likely that visually impaired people will use them," says Peli, who adds that the glasses are easier to use than existing telescope models because of a wider magnified view and easier access to that view. Most importantly, shifting the magnified view up leaves the unmagnified view of the road unobstructed, which is important for safety and facilitates navigation.

Tiny telescopes (known as Biotics) mounted on glasses to help people with visual impairments have been in existence for about 60 years. They are permitted for use in driving by 39 states. These telescopes enable a visually impaired driver to read road signs and see other objects essential for safe driving, while also viewing the larger scene in front of the vehicle. In previous designs, the telescope is mounted through the top of the regular lens or above the frame. In both cases, the telescopic eyepiece is above the wearer's pupil, requiring the driver to tilt his/her head up and down rapidly to view alternatively the magnified and unmagnified scenes. Drivers use the telescope only for a very small fraction of the driving time, looking through the regular spectacle lens most of the time.

While these bioptic telescopes are useful and helpful, many potential users have resisted them because of their strange appearance, and because the magnified view through the telescope is narrow.

In the newer glasses, Peli and his co-inventor Dr. Vargas-Martin from the University of Murcia, Spain, designed a wide-field telescope made of straight and curved mirrors built completely within the spectacle lens,

The Journal of Biomedical Optics article describes the process that Peli and his team went through as they created and tested various prototypes of telescopes leading to the design that would be most effective and comfortable for patients with low vision. They started with a telescope made with mirrors and lenses to prove the image shifting principle. To embed the whole telescope inside the spectacle lens they had to obtain the magnifying power from curved mirrors instead of lenses, as mirrors maintain their power when embedded inside the spectacle lens, while the lenses lose their power when not in the air. Regular spherical mirrors can not be tilted without loss of focus, so they constructed a version made with tilted parabolic mirrors. The latter worked well and was in focus, but the images were distorted enough due to the parabolic shape to cause a disturbing effect during head movements. The latest design they constructed is based on spherical and flat mirrors with the flat mirrors implemented as tilted beam splitters that use polarization to reduce light loss.

Says Peli, "The short height of the actual magnifier, its position, and inclusion of a small tilt of the last flat mirror (the one closest to the user's eye), enables the wearer to simultaneously view the magnified field above the unmagnified view of the uninterrupted horizontal field.

Not only will the new glasses improve the cosmetics and usefulness of this type of device, the in-the-lens design will make it possible to mass-produce the telescopic magnifier as a standard spectacle lens blank and allow an individual's prescription to be added using the standard procedure for grinding regular spectacle lenses. This process should also reduce the price of bioptic telescopes

The next step for the team is to find a corporate partner to manufacture the lens blanks and distribute them to the public.

As the population ages and millions of American face limited vision because of eye disorders, such as age-related macular degeneration, the need for this type of vision aid will increase dramatically. The telescopic glasses may also find use in other markets. It may be used as hands-free opera glasses and may be of interest to hunters, police or military personnel who would like the ability to quickly and easily achieve a hands-free magnified view.


'/>"/>

Contact: Patti Jacobs
pjacobs12@comcast.net
617-864-2712
Schepens Eye Research Institute
Source:Eurekalert

Related biology news :

1. Ohio scientists develop blue-blocking glasses to improve sleep and ADHD symptoms
2. Prototype terahertz imager promises biochem advances
3. New CPR promises better results by compressing abdomen, not Chest
4. Innovative civil engineering application promises cleaner waters
5. Destruction of Sumatra forests driving global climate change and species extinction
6. The race for biofuels driving alternative sources of biomass
7. Extended wakefulness, combined with alcohol, severely impairs driving performance
8. Alcohol and sleep restriction can affect young mens alertness and driving performance
9. Magnet Lab researchers make observing cell functions easier
10. Researchers find way to make tumor cells easier to destroy
11. Clinical trial that may help patients breathe easier begins at Central DuPage Hospital
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/28/2016)... BANGALORE, India , April 28, 2016 ... of Infosys (NYSE: INFY ), and Samsung SDS, ... partnership that will provide end customers with a more ... payment services.      (Logo: http://photos.prnewswire.com/prnh/20130122/589162 ) ... financial services, but it also plays a fundamental part in ...
(Date:4/26/2016)... LONDON , April 26, 2016 /PRNewswire/ ... Systems, a product subsidiary of Infosys (NYSE: ... partnership to integrate the Onegini mobile security platform ... http://photos.prnewswire.com/prnh/20151104/283829LOGO ) The integration ... security to access and transact across channels. Using ...
(Date:4/19/2016)... -- The new GEZE SecuLogic access control ... system solution for all door components. It can be ... interface with integration authorization management system, and thus fulfills ... dimensions of the access control and the optimum integration ... considerable freedom of design with regard to the doors. ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... -- Houston Methodist Willowbrook Hospital has signed a ... serve as their official health care provider. As ... provide sponsorship support, athletic training services, and most ... athletes and families. "We are excited ... to bring Houston Methodist quality services and programs ...
(Date:6/23/2016)... 2016   EpiBiome , a precision microbiome engineering ... debt financing from Silicon Valley Bank (SVB). The financing ... advance its drug development efforts, as well as purchase ... "SVB has been an incredible strategic partner to us ... bank would provide," said Dr. Aeron Tynes Hammack ...
(Date:6/23/2016)... 2016 Apellis Pharmaceuticals, Inc. today announced ... of its complement C3 inhibitor, APL-2. The trials ... dose studies designed to assess the safety, tolerability, ... in healthy adult volunteers. Forty subjects ... single dose (ranging from 45 to 1,440mg) or ...
(Date:6/23/2016)... (PRWEB) , ... June 23, 2016 , ... ... is exhibiting at the Pennsylvania Convention Center and will showcase its product’s latest ... ClinCapture will also be presenting a scientific poster on Disrupting Clinical Trials in ...
Breaking Biology Technology: