What goes on your head? Head mounted devices

Transcription

1 What goes on your head? Head mounted devices Bhavani Iyer OD, FAAO Director, Dan Arnold Center for Vision Rehabilitation Clinical Associate Professor, The University of Texas, McGovern Medical School

2 Why head mounted systems? Ease of use- always available Cosmesis- sleek look, better tolerance for strangeness Hands free- allows other things to be done while system is in use Portable Traditional CCTVs too heavy to carry around

3 Basic types of head mounted systems Optical systems Use system of lenses separated by a certain distance Manual focusing capability Fixed magnification options Electronic systems Use a heads up display Automatic focusing capability Multiple magnification options

4 Optical systems Beecher binocular- upto 8x Pros: great for watching games Cons: bulky

5 Ocutech- 4.0x to 6.0x Ocutech sightscope- 2.2x Pros: good field of view Cons: expensive, cosmesis, monocular Pros: flips out, binocular, easy to use Cons: cosmesis, low magnification

6 BITA Designs for vision Pros: Small, discreet, great for students Cons: low magnification, small field of view Pros: good field view, upto 4.0x, great for bioptic driving Cons: cosmesis, weight

7 JORDY (Joint Optical Reflective Display)

8 Where we are now ORCAM Nueyes Future?

9 Three major systems currently available Esight- uses digital magnification technologyutilizes sight- VR Nueyes- uses digital magnification technology and OCR- VR and OCR ORCAM- OCR technology- utilizes speech

10 esight Goggle style- Headset Custom prescribed lenses Controller

11 The technology behind the device- An HD camera on the Headset takes a live video from the environment This is sent to a controller The image is processed and sent back to the viewer Image seen on 2 LED displays

12 Diseases and acuity ranges macular degeneration, Stargardt s disease, ocular albinism, diabetic retinopathy, Leber s optic neuropathy, cone-rod dystrophy acuity ranges from 20/60 and 20/400 age ranges: 8 to 88; best for those under 75.

13 Pros and cons Pros: Wide viewing fieldequivalent to a 60 screen. Ability to zoom Reversible contrast Color display Weight: 6oz Cons: Bulky Cannot really walk around with it Immersive, no real life feel Cost- $10,000 Not good for tunnel vision? Weight- 6oz

14 cognition Choosing the candidates- ability to tolerate the weight of device Eye hand coordination Dexterity of fingers

15 Rehabilitation involved- have to work with low vision OD a. Pre- device training b. Post- device training

16 Head unit- Spectacle frame with custom Rx a High resolution camera A speaker that uses bone conduction ORCAM

17 The technology behind the device Uses real time immediate processing- all-inclusive system; OCR technology Finger gestures- pointing- recognizes the nail bed and reads what s pointed; hand in front of the page stops it from reading Face recognition capabilities Recognizes familiar objects, common daily items in the fridge for example

18 Pros Superior cosmesis- looks like Google glasses, cool factor Face recognition great for working age population, elderly. Light weight- about 20gms, base unit clips to pocket Highly portable Mobility is not impaired- can walk around with the device Teachable- has the ability to learn new objects and faces- up to 100 Replaces dependence on vision Able to read even if paper is held upside down Costs $4500 for the full version (with face recognition, reading and object recognition)

19 Cons Hearing impaired cannot use it Not consistent with face recognitionconfuses people sometimes Does not read curved surfaces- cans/ labels Does not do well with small objects- eye drops; does not have a wide enough field to search for the object of interest Does not read handwriting/ cursive print Does not improve vision any

20 Diseases and acuity ranges that can benefit from this device All diseases- central and peripheral vision loss All acuity ranges- from 20/60 to NLP; however, best for 20/400 to CF from personal experience. Less expensive options available for the better acuity ranges that amplify vision. Since this does not amplify vision in anyway, some patients feel they are wasting their vision Some vision is actually good for using the device since patients do need to be able to point to what they want to read. This helps to avoid reading fluff- material that the person did not intend to read

21 NuEyes

22 Features Variable Magnification from 1x-12x- Digital camera with a stereoscopic HUD Various contrast and color changes Voice Activated Wireless Lightweight Design Text-to-Speech (OCR) Stream TV and Movies to the Glasses

23 Technology behind the system NuEyes uses an HD (High Definition) digital camera mounted on the center bridge of the glasses to stream images to the built-in 3D stereoscopic HD display lenses. The full HD camera can shoot 1080p resolution at 60 frames per second. The camera image is projected onto the frame-mounted displays. NuEyes enlarges and enhances images captured by the camera on the inside of the glasses lenses to help people with vision loss see better. NuEyes uses Osterhout Design Group s curved mirror technology. Small projectors in the lenses over each eye project the image down onto a light blocking lens display.

24 Pros Cosmesis: certainly better than prior systems Lighter than prior systems Wireless Cost is lower 60 degree field of view Cons Cosmesis- has not eliminated the strangeness factor Head piece can get hot Battery discharges rather quickly

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