Benefits of New Electronic Magnification Devices Versus Conventional Magnifiers For Those With AMD and Other
Low Vision Conditions
Kevin Huff O.D.ViewFinder
Low Vision Resource Center
www.viewfinderlowvision.com
1830 S. Alma School Rd. 10001 W. Bell Road Mesa, Arizona 85210 Sun City, Arizona 85351
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My Qualifications
My professional experience
My personal experience
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Background Information
Low Vision Rehabilitation Definition
Any chronic “uncorrectable” visual impairment that limits daily functioning
Better defined by the main goal
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Goal of Low Vision Rehabilitation
Independence
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Three main tools ofLow Vision Rehabilitation Use Vision More Efficiently
Modify the size of the object (Magnification)
Enhance Contrast (usually by improving lighting)
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Using Vision More Efficiently
Conditions like Macular Degeneration affect the central vision
Conditions like Glaucoma and Retinitis Pigmentosa affect the peripheral vision
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Using Vision More Efficiently
Patients can be trained how to use parts of their vision that still remain
Eccentric Viewing Training
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Using Vision More Efficiently
Visual Fields and Scotoma awareness:
Humphrey 10-2: usually for Macular Problems
Humphrey 30-2: usually for Glaucoma, Retinitis Pigmentosa, Strokes
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Using Vision More Efficiently
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Magnification Works
Patients with Macular Degeneration are great candidates for magnification
Magnification makes objects big enough to allow patients to “get around” blind spots
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Magnification Works If a patient’s blind spot is large enough to block
an object the patient will not see it
If that same object is magnified so that it is larger than the blind spot, the brain is able to fill in the missing information as if blind spot isn’t there
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Magnification Types Relative Size Magnification
Relative Distance Magnification
Angular Magnification
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Magnification Types Relative Size Magnification
Make the object larger
○ i.e. Large print items
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Magnification Types Relative Distance Magnification
Bring things closer
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Magnification Types Angular Magnification
Magnification through optics
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Contrast Sensitivity
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Contrast Sensitivity
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Contrast Sensitivity Contrast Sensitivity is lost in most diseases that
cause low vision, especially macular degeneration Contrast can be enhanced in two ways
LightingPhysically changing the material to high contrast colors
such as black and white
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Summary So Far
Tools available Use eyes more efficiently Enhance Contrast Magnification
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Summary So Far
Magnification Types Relative Size Relative Distance Angular Magnification
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Near point Optical Devices
Conventional Spectacles/ Microscopic Glasses
Hand Magnifiers
Stand Magnifiers
Telemicroscopes
Electronic Devices(888) 811-3161
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Conventional Spectacles/ Microscopic Glasses Use Relative Distance magnification
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Conventional Spectacles/ Microscopic Glasses ADVANTAGES
Hands-free
Cosmetically acceptable
Option patients ask for the most
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Conventional Spectacles/ Microscopic Glasses DISADVANTAGES
Fixed reading distance
Short working distance
Obstructs illumination
Binocularity not possible above +10.00 DS
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Conventional Spectacles/ Microscopic Glasses
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Conventional Spectacles/ Microscopic Glasses
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Conventional Spectacles/ Microscopic Glasses
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Hand Magnifiers
Use Angular Magnification primarily
Illuminated magnifiers enhance contrast
Can also be used with relative distance magnification
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Hand Magnifiers
ADVANTAGESPortable
Inexpensive
Greater working distance than glasses
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Hand Magnifiers DISADVANTAGES
Reduced field of view
Both hands occupied
May be difficult to keep in focus
Not great for long term tasks, especially over 4X
Problems with hand tremor or arthritis
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Hand Magnifiers
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Stand Magnifiers
Use Angular Magnification primarily
Illuminated magnifiers enhance contrast
Can also be used with relative distance magnification
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Stand Magnifiers ADVANTAGES
Fixed focal length
Portable
Better than hand magnifier over 4-5X
Can be used with hand tremors
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Stand Magnifiers DISADVANTAGES
Reduced field of view
Reduced illumination
Requires the use of accommodation, reading glasses or a bifocal
Each stand magnifier has specific requirements for add power to maintain clarity & magnification
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Stand Magnifiers
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Stand Magnifiers
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Telemicroscopes
Use angular magnification
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Telemicroscopes
ADVANTAGESMounted to keep hands free
Longer working distance than glasses
Binocularity up to 5X
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Telemicroscopes
DISADVANTAGESCritical depth of focus or working distance
Smallest field of view for comparable magnification
Decreases contrast
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Telemicroscopes
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Telemicroscopes
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Electronic Devices Use relative size magnification (or is it angular
magnification?) Can use relative distance magnification Enhance contrast Can be used with eccentric viewing
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Electronic Devices Advantages
Large range of magnification (up to 75X)
Increased Contrast
Decreased Glare
Increased Working Distance
PC Compatible
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Electronic Devices Advantages
Portable
Capture images
Distance vision
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Electronic Devices
Disadvantages
Cost: Many options available to help with this
Portability: Not a problem anymore
Hard to use: this is a myth
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Electronic Devices
Types of Electronic Devices
Desktop
Portable
New Type that I call the Acrobat Class
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Merlin LCD
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Merlin LCD
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Merlin LCD 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
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Merlin LCD
Excellent option for near tasks
Reading
Writing
Looking at photos
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Merlin LCD Features Simple, easy to use controls Long lasting LED lighting for truer picture and
color 19”, 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
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Acrobat LCD
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Acrobat LCD
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Acrobat LCD
When the Acrobat 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
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Acrobat LCD
Moving camera head allows patient to use this device for multiple tasks
Reading
Writing
Working with hands
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Acrobat LCD
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
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Acrobat LCD Features Auto focus 3-in-1 camera for seeing yourself up
close, reading and distance viewing Detachable camera for use at multiple work
stations 19”, 22”, & 24” provide up to 82x 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
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Transformer
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Transformer
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Transformer Similar Advantages to Acrobat LCD with a few
extras
Even more portable
Able to capture images
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Transformer Excellent option for students or people who
attend presentations/ conferences often
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Transformer Features 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
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Amigo
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Amigo
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Amigo
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Amigo
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
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Amigo Features 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
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Pebble
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Pebble
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Pebble Lightweight Portable CCTV
Ideal size for patient to carry with them
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Pebble Can be used for reading and many near spotting
tasksReading menus
Shopping- seeing price tags and labels
Seeing household items like stove dials and thermostats
Signing documents such as checks and receipts
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Pebble Features Adjustable magnification 2x to 10x Lightweight design 3.5” or 4.3” high resolution LCD Large viewing area in a small package Adjustable brightness 28 available viewing modes Foldable handle with comfort grip Freeze image feature with capability to magnify
and change mode. 2 year warranty
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To Schedule a Free – No Obligation in Home Demonstration
Call: 888-811-3161
Email: [email protected]
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