Adapting to visual impairment - learning to see through visually impaired eyes
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Adapting to visual impairment - learning to see through visually impaired eyes

Adapting to visual impairment - learning to see through visually impaired eyes
Tuesday October 29th 2013 Webinar

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Adapting to visual impairment - learning to see through visually impaired eyes Presentation Transcript

  • 1. Adapting to Visual Impairment: Learning to see through visually impaired eyes Kevin Huff O.D. Viewfinder Low Vision Resource Center www.viewfinderlowvision.com
  • 2. Independence Despite Visual Impairment  When someone is diagnosed with visual impairment, the biggest fear that most people are forced to face is loss of independence.  Decreased visual acuity does not have to lead to a loss of independence  To face the challenges that come from visual impairment, patients must embrace the tools available
  • 3. Tools we use Contrast  Illumination  Glare Control  Sound  Magnification  Using eyes more efficiently 
  • 4. Enhance Contrast • Most people with visual impairment see better if objects are black and white.
  • 5. Enhance Contrast
  • 6. Enhance Contrast  Set dishes on contrasting placemats
  • 7. Enhance Contrast
  • 8. Enhance Contrast
  • 9. Enhance Contrast
  • 10. Enhance Contrast
  • 11. Increase Illumination • • • A person in their 80’s requires nearly three times as much light as a 20 year old A person who is visually impaired will need even more lighting Use gooseneck lamps, flashlights and illuminated magnifiers • Task lamps will provide the needed light without causing glare
  • 12. Increase Illumination • Top photo … 100 watt can flood lights 12 feet above counter top • Bottom photo … same flood lights with 75 watt task lamp 12 inches from page
  • 13. Increase Illumination
  • 14. Increase Illumination
  • 15. Control Glare • Glare can further reduce vision and cause eye fatigue • Decrease glare • Lighting • Windows • Sun
  • 16. Control Glare • Tinted Lenses • Fitovers, Slip-ins, Clip-ons, or actual tinted lenses • Transitions • Anti-reflection coatings
  • 17. Control Glare • Hats, caps, visors • Yellow acetate filters over shiny pages • Lighting from behind • Pin-hole contact lens for aniridia patients
  • 18. Control Glare
  • 19. Sound
  • 20. Sound  There are many products available that use sound.  Examples: Talking watches/clocks, talking scales, audio books, new CCTV’s with OCR technology
  • 21. Sound  Unfortunately, if your hearing is not good, these products are not helpful.  The old belief that when one sense goes away, the others take over is not usually true.
  • 22. USE YOUR EYES AND TOOLS MORE EFFECTIVELY  Practice and Patience ◦ Patients who have not read in a long time require practice to return to a functional level of reading ◦ For every week a person has not read, it will take 1 day of practice to learn to read with reasonable speed and accuracy
  • 23. USE YOUR EYES AND TOOLS MORE EFFECTIVELY  It is much easier to use low vision aids and continue to use them if you start using them when you don’t need a lot of magnification  You may not want to wait until your eyes are “stable“ to start pursuing the tools you need for independence
  • 24. USE YOUR EYES AND TOOLS MORE EFFECTIVELY • • Conditions like Macular Degeneration affect the central vision Conditions like Glaucoma and Retinitis Pigmentosa affect the peripheral vision
  • 25. USE YOUR EYES AND TOOLS MORE EFFECTIVELY • Patients can be trained how to use parts of their vision that still remain • Eccentric Viewing Training
  • 26. USE YOUR EYES AND TOOLS MORE EFFECTIVELY  Eccentric Viewing ◦ A person with a normal healthy retina uses the macula, the very center of the retina, to view an object or print  A healthy macula has the highest density of cone cells allowing clear vision and color perception ◦ A person with an unhealthy macula can learn to use a more peripheral part of the retina in order to see more clearly
  • 27. USE YOUR EYES AND TOOLS MORE EFFECTIVELY  Eccentric Viewing ◦ Do not move your head when trying to find the clearest peripheral retinal loci  Move eye only ◦ Identify the distorted or blind areas in the retina.  An Amsler Grid may help
  • 28. USE YOUR EYES AND TOOLS MORE EFFECTIVELY  Eccentric Viewing ◦ By using the “Clock Technique” identify the clearest part of the peripheral retina.  Don’t look at what you want to see!  Look slightly above, below or to the side of the object that you wish to see in order to see it more clearly  This area may differ for different tasks such as reading and watching TV
  • 29. USE YOUR EYES AND TOOLS MORE EFFECTIVELY  Exercises that involve tracing and identification will help to learn to use this clearest part of the retina  Detail vision will not be fully regained by eccentric viewing training, but vision can be greatly improved when coupled with enlargement, enhanced contrast, and appropriate magnification devices
  • 30. USE YOUR EYES AND TOOLS MORE EFFECTIVELY • Visual Fields and Scotoma awareness: • Humphrey 10-2: usually for Macular Problems • Humphrey 30-2: usually for Glaucoma, Retinitis Pigmentosa, Strokes
  • 31. USE YOUR EYES AND TOOLS MORE EFFECTIVELY
  • 32. Three Types of Magnification • Relative Distance Magnification • Relative Size Magnification • Angular Magnification
  • 33. Relative Distance Magnification  Get closer to objects.  This magnifies by enlarging the angle that the object subtends on your retina
  • 34. Relative Distance Magnification  This is why stronger glasses sometimes helps.  When the prescription is stronger, the patient is required to hold things closer to their face to get the print in focus. This magnifies the object being read.
  • 35. Relative size magnification  Make things physically bigger, i.e. Large Print Items
  • 36. Relative Size Magnification • Bold print on white label attached to medicine bottle
  • 37. Relative Size Magnification
  • 38. Angular Magnification • Object is not changed in position or size, but an optical system is placed between the object and the eye making the object appear larger • Hand magnifier • Telescope • Electronic Magnification
  • 39. Angular Magnification • Hand magnifiers • The stronger the magnifier, the smaller the lens • Always use an illuminated magnifier • LED Illumination
  • 40. Angular Magnification  Stand Magnifiers ◦ The stronger the magnifier, the smaller the lens ◦ Good for patients with tremors
  • 41. Angular Magnification  Telemicroscope ◦ Better working distance ◦ Narrow field of view
  • 42. Angular Magnification • Telescopes • Spectacle mounted: permanent mount or clip-on • Hand held with either neck cord or finger ring • Used for computer, music, TV distance or intermediate tasks
  • 43. Angular Magnification  Bioptic Telescopes ◦ Steadier view than hand held ◦ Some are able to walk/drive with them
  • 44. Angular Magnification  Video MagnificationCCTV’s
  • 45. Angular Magnification • • Advantages of video magnification Magnification up to 72X • Optical magnification up to 20X (80 diopters) • Allows sufficient reading speed to make continuous text meaningful at high levels of magnification • Image polarity can be reversed increasing contrast and decreasing glare • Easily and instantly converts any material to large print • Can be easily adjusted for fluctuation of vision
  • 46. Angular Magnification • Advantages of video magnification  Increased Working Distance  PC Compatible  Portable  Capture images  Distance vision  OCR technology
  • 47. Angular Magnification • Disadvantages • Cost: Many options available to help with this • Portability: Not a problem anymore • Hard to use: this is a myth
  • 48. (888) 811-3161 www.enhancedvision.com
  • 49. DaVinci is a high performance desktop video magnifier (CCTV).  Featuring HD, text-to-speech and a 3-in-1 camera.  HD provides a beautiful crystal clear picture and vibrant color.  Experience the joy of reading with the push of a button.  (888) 811-3161 www.enhancedvision.com
  • 50. ◦ Sony HD auto focus 3 in 1 camera – see near, far and everything in between. ◦ Read any printed text with the push of a button. ◦ 24” High resolution HD LCD. ◦ Reading zone preview with motion detection ◦ 28 viewing modes allows you to personalize DaVinci - perfect for reading newspapers, magazines and doing crossword puzzles. ◦ Slide mechanism provides flexibility for various camera arm positions. (888) 811-3161 www.enhancedvision.com
  • 51. (888) 811-3161 www.enhancedvision.com
  • 52. Merlin elite is a high performance desktop video magnifier (CCTV).  Featuring HD and text-to-speech.  HD provides a beautiful crystal clear picture and vibrant color.  Experience the joy of reading with the push of a button.  (888) 811-3161 www.enhancedvision.com
  • 53. ◦ Sony HD auto focus camera – work on hobbies and see small details. ◦ Read any printed text with the push of a button. ◦ 24” High resolution HD LCD. ◦ Reading zone preview with motion detection ◦ 28 viewing modes allows you to personalize Merlin eliteperfect for reading newspapers, magazines and doing crossword puzzles. ◦ Screen easily pivots horizontally and vertically-providing the most comfortable viewing position. (888) 811-3161 www.enhancedvision.com
  • 54. Merlin LCD & HD (888) 811-3161 www.enhancedvision.com
  • 55.  Desktop CCTV  Combines large magnification range with large field of view  Enhances Contrast  Tray allows for smooth reading even at higher magnification levels  Controls are very easy to use (888) 811-3161 www.enhancedvision.com
  • 56.  Excellent option for near tasks ◦ Reading ◦ Writing ◦ Looking at photos (888) 811-3161 www.enhancedvision.com
  • 57.        Simple, easy to use controls Long lasting LED lighting for truer picture and color 20”, 22” and 24” Monitors Magnification 2.4x to 85x varies with monitor size Screen easily pivots, both horizontally and vertically to provide the most comfortable viewing position You can personalize with 7 viewing modes 3 year warranty (888) 811-3161 www.enhancedvision.com
  • 58. (888) 811-3161 www.enhancedvision.com
  • 59.  When the Acrobat HD/LCD was introduced, it created the standard for a new class of CCTV ◦ The portable desktop CCTV ◦ Ideal for patients who travel for extended periods of time, i.e. winter visitors in Arizona ◦ No longer have to purchase two desktop CCTVs (888) 811-3161 www.enhancedvision.com
  • 60.  Moving camera head allows patient to use this device for multiple tasks ◦ Reading ◦ Writing ◦ Working with hands (888) 811-3161 www.enhancedvision.com
  • 61.  Moving camera head allows patient to use this device for multiple tasks ◦ See their own face, i.e. makeup, shaving etc. ◦ See others faces, i.e. grandchildren ◦ Distance vision (888) 811-3161 www.enhancedvision.com
  • 62. Features       Sony HD auto focus 3-in-1 camera for seeing yourself up close, reading and distance viewing Detachable Sony HD camera for use at multiple work stations 22”, 24”, & 27” provide up to 95x adjustable magnification (varies with LCD size) 28 available viewing modes to optimize contrast and brightness Line markers, object locator, remote control and more… Two Year Warranty (888) 811-3161 www.enhancedvision.com
  • 63. (888) 811-3161 www.enhancedvision.com
  • 64. (888) 811-3161 www.enhancedvision.com
  • 65.  Similar Advantages to Acrobat LCD with a few extras ◦ Even more portable ◦ Able to capture images (888) 811-3161 www.enhancedvision.com
  • 66.  Excellent option for students or people who attend presentations/ conferences often (888) 811-3161 www.enhancedvision.com
  • 67.          Weighs less than three pounds 2.4x to 30x magnification (based on17” screen) Camera rotates 330 degrees reading, distance & self viewing modes Connects to laptop, desktop computer or monitor. 28 custom color select modes Battery operated - up to 4 hours Built in LED lighting Auto install software/ plug & play 2 year warranty (888) 811-3161 www.enhancedvision.com
  • 68. (888) 811-3161 www.enhancedvision.com
  • 69. (888) 811-3161 www.enhancedvision.com
  • 70. (888) 811-3161 www.enhancedvision.com
  • 71.  Large portable CCTV ◦ Extremely large field of view for portable CCTV ◦ Screen tilts up and down to allow for comfortable use ◦ Can be connected to TV Monitor for even larger field of view ◦ Able to freeze images (888) 811-3161 www.enhancedvision.com
  • 72.         Crisp, high-definition image Lightweight and portable 3.5x to 14x magnification Large 6.5” anti-glare LCD screen tilts for most comfortable viewing angle Large field of view allow the reader to see more of the reading area Freeze frame with adjustable size and contrast 6 viewing modes to optimize contrast and brightness 2 year warranty (888) 811-3161 www.enhancedvision.com
  • 73. (888) 811-3161 www.enhancedvision.com
  • 74. (888) 811-3161 www.enhancedvision.com
  • 75. New HD camera providing a crisp, clear colorful, high definition picture.  It’s new ergonomic lightweight compact design makes it the perfect companion whether at home or on the go.  (888) 811-3161 www.enhancedvision.com
  • 76.  Can be used for reading and many near spotting tasks ◦ Reading menus ◦ Shopping- seeing price tags and labels ◦ Seeing household items like stove dials and thermostats ◦ Signing documents such as checks and receipts (888) 811-3161
  • 77.           Adjustable magnification 1.25x to 13.5x Pebble HD Adjustable magnification 2x to 10x Lightweight design 3.0” or 4.3” high resolution LCD Large viewing area in a small package Adjustable brightness 28 available viewing modes Multi-purpose handle with comfort grip 4.3” Freeze image feature with capability to magnify and change mode. (888) 811-3161 2 year warranty www.enhancedvision.com
  • 78. To Schedule a Free – No Obligation in Home Demonstration Call: 888-811-3161 Email: marketing@enhancedvision.com www.enhancedvision.com (888) 811-3161 www.enhancedvision.com