VISUAL AIDS
In this section, we will show you pictures of some of the visual aids
that are currently available. The picture quality is not the best in
the world, but at least you can get an idea of the size of these devices
as well as their general physical styles. Along with the pictures, we
have included some text for each device to help you to better understand
what it does best and its other important properties.
This picture shows eleven different visual aids side by side so that you
can compare them by size. The size and design of each device is as
unique as its intended benefit, natural limitations, and cost. No visual
aid that I am aware of is best suited for all situations or conditions.
The first visual aids we will discuss is a regular pair of binoculars.
It might seem trivial to people with good eyesight, but this device
helps people with low vision to see things from a distance that others
could see without it. It could be used for watching birds and looking
at scenery on trips. It will not help to read small print nor would it
be useful for most everyday duties.
Pictured here is a colllection of assorted styles of magnifiers. The
lower power magnifiers can be used to read material that is just a bit
too hard to read without an aid. The higher power devices come in handy
for reading from the dictionary or phone book. The one problem with all
of these devices pictured is that they require the use of one hand to
hold them. You cannot hold a book and turn the page while holding a
visual aid in place all at the same time.
One device not in this picture (but is in the picture of all devices
together, (bottom righthand corner) is the flat page magnifier. These
may come with a stand. It is very useful for placing over the page of a
book and being able to read without holding the magnifier in place or
having to move the magnifier back and forth as you read.
Pictured here is a colllection of assorted loupes, often called Jewelers
loupes because they are commonly used in fine jewelery work. These are
available in a range of sizes, styles, and magnification powers. Some
of these have multiple lens sections that can be combined to allow many
magnification powers from the same device, such as the square white
loupe in this picture.
Loupes are more useful for reading minimal amounts of material at a time
because of the small lens size. For example, you would use a loupe to
read your favorite recipe rather than reading the whole newspaper. Some
people use loupes for reading thermometers, dial settings (on stoves,
washing machines, etc), and have a CCTV (see below) for reading books
or other printed material.
The Beecher Mirage was one of the first visual aids available that
was worn like a pair of glasses. They are still available today from
low vision centers. It is said to be similar to opera glasses in power
and style. The device is just like a pair of binoculars, except that it
mounts on a headband for handsfree usage. This device can be useful for
watching TV and movies. The front lens is higher than eye level, which
allows you to see your regular view around the small eyepieces where the
magnified view appears. Reading caps can be obtained for the Mirage that
slip on the front lens and allow for reading instead of distance viewing.
A spotting scope is a monocular (for one eye) device which offers up to
50x power magnification. It is the largest and heaviest visual aid that
is covered here, but it also offers over three times the magnification of
the second best pair of binoculars here. It would be useful for distance
viewing such as bird or wildlife watching or looking at scenery.
Here are two other binoculars which are smaller than what we have
discussed above. They offer easier portability and can be used while
traveling to read street or business names.
This monocular mounts to glasses (either prescription or clear) and can
flip up out of the view with the motion of one hand. Because it mounts
to glasses, it offers hands free usage. It is also very light and does
not cause much added pressure to the nose in extended wearing.
This is another view of the device mentioned above. One very nice
feature of this device is that it allows one hand focus ability,
which will also quickly adjust between distance and close (reading
distance) viewing. It closely matches the Mirage mentioned above,
but is much lighter and less obstructive in the normal view.
This is a CCTV (closed circuit TV) device made to magnify text and
objects. There is a camera which points toward a section of the movable
tray. The picture on the monitor can be controlled with a few adjustment
knobs for focus, magnification, contrast, and even some line reading
guides. The device can greatly enlarge small print and will also allow
visually impaired people to trim their own fingernails and other
difficult tasks. Almost anything which can be placed between the camera
and the tray can be greatly magnified with this device. In this picture,
the screen shows the lowest magnification setting while viewing
dictionary print. This shows 20 lines and 53 characters from this
dictionary.
In this picture, the screen shows the highest magnification setting of
the CCTV above while viewing the same dictionary print. It shows 3 lines
and 7 characters with this setting. For reference, the measurements of
a standard character in this dictionary is 1/16" wide. The character
was 1/4" wide on the screen at lowest magnification and 3/2" at the
highest magnification. This means the magnification power of the device
is 4 to 24 times the size of the original object.
Newer CCTV devices usually feature a larger flat screen
which is less bulky than the old style monitors.
Pictured here is an Acrobat LCD with a flat panel
monitor and the camera mounted on a moveable arm to
provide for viewing of objects at different angles
or places.
Some of the modern units allow for close or distant
object magnification. The device pictured here can
enlarge text on material using the reading mode, help
with personal grooming with the mirror mode, and zoom
in on the stage during a presentation with the distance
mode.
These units allow for a wide range of magnification
levels as well as different color or video modes.
It is possible to take these units with you when you
travel, but they have to be plugged in to an outlet
while in use (they do not use batteries). Some of
these come with a travel case or you may be able to
purchase a case as an option. The case is about the
size of a suitcase and many have wheels so you do
not have to carry the device.
Those seeking more portable devices now have a variety
of "Video Magnifiers" to choose from. These
compact hand held devices have an LCD screen on top
with a camera underneath. You simply position the
device over the material you want to enlarge and view
it on the screen. Unlike the desktop devices
described above, these require that the material is
very close to the camera. They are not for distance
viewing. Pictured here is a Pebble video magnifier.
These units usually have a few levels of magnification
and some different color or video modes. Some units
can capture (freeze) an image on the screen, which is
handy for viewing items away from you, such as on the
top or bottom shelf at a store.
The benefit of the video magnifiers is that they are
lightweight and operate on batteries (usually
rechargeable batteries come with the unit). They do
a wonderful job of enlarging price tags or product
labels at the store. These can also be used to help
write checks or fill out forms, some units include
a stand to provide a hands free operation.
Another option for portable use is the Jordy, which
is pictured here. The Jordy is a light weight head
gear visor, worn much like a hat. This provides for
a hands free operation.
The Jordy visor has two small LCD screens (one for
each eye) and a camera that points forward. While
wearing the device the screens show images just like
you are looking at them in normal situations. This
offers a more "natural" feel over the effect
provided by desktop magnifiers.
The unit is controlled by a seperate box, which can
clip onto a belt or pocket. Using this you can
adjust the level of magnification, color modes, and
other settings. The small rechargeable battery pack
attaches to the control box.
The Jordy provides for either close or distance
viewing. With the reading lens closed you can
view material from about a foot away. Without the
reading lens you can view distant objects, much
as like with binoculars. Although this allows you
to view distant objects better, it is NOT recommended
for walking or driving (any activity where you are in
motion) due to the much smaller "field of
view" which restricts the abiltiy to safely
navigate around objects.
While the Jordy's main benefit is its head worn use,
there is an optional Stand for the visor which allows
it to operate much like a desktop style magnifier.
The Jordy can also be connected to a television or
any device which has video inputs.
There are many more visual aids available. This is just a sampling so
that you can get an idea of what each type might look like and the tasks
they would most likely be useful for.
|