Low Vision Assistance

Hi, I’m Dr. Tiffany Chan. I’m an optometrist in the Low
Vision Rehabilitation Division at the Wilmer Eye Institute, Johns Hopkins Bayview
Medical Center. So the term low vision,
refers to anyone who has chronic vision impairment, that cannot
be corrected with glasses, contact lenses, medication,
or even surgery. So oftentimes, vision impairment
can cause difficulty performing daily activities,
such as reading, seeing faces, watching television or
traveling independently. So my job as a vision
rehabilitation specialist is to try to maximize
the remaining vision of those patients which
chronic vision impairment. I do that in a variety of
different ways by using different tools or devices
such as magnifiers, filters, contrast enhancement, or even
using our other sense such as our sense of touch or hearing to
supplement the vision changes. So I’m going to show you a few
examples of devices that I work with. So this is an example of a
traditional hand-held magnifier. So with this one,
similar to other magnifiers. Has a light here and
this can magnify the image and allow a person to read
small print again. If someone has even more
reduced vision or lower vision, they may need more
magnification. So this is an example of
an electronic magnifier. So there’s a camera
on one side and when you put that on top
of the reading material, it can enhance the magnification
and we have a variety of different settings to
manipulate that print. So for example,
by pressing a button here, I can increase
the magnification. So if someone has to read very
small print then we’d use a higher amount
of magnification. Or if they had large print on
labels that they were looking at in the grocery store,
we would use less magnification. Another feature of
this magnifier is contrast enhancement. So contrast, or the boldness
of print is very important for being able to read especially
if the print is very faint. So by pressing this button we
can enhance the contrast, or make that print more bold and
dark. And by pressing the button
again I can actually reverse the polarity of the contrast. So now the print is white
with a black background, rather than black print on
a white background, and that can make all the difference
when people are trying to read printed material. So as I discussed earlier, sometimes people have difficulty
seeing things at a distance, such as faces or
watching television. So this is an example
of telescopic glasses. So you can see there’s
a double lens here. And that allows magnification
when people are looking at things far away. So this type of device
is worn similarly to a traditional
pair of glasses. You can see how
magnified the image is when they are looking
at a distant object. And this can allow that
person to see details from watching television. So another thing that we
talked about earlier, sometimes people have difficulty
doing things and we need to rely on other sense such as
our sense of touch or hearing. So this is an example
of a clock. If we press the button here. [SOUND]
>>The time is now seven minutes to 10 AM.>>So Instead of relying on our
vision to be able to tell what time it is, we can use our
auditory to hear what time it is, so there’s a variety of
different tools that we can use. To supplement
the vision in that way. So if you or a loved one have
chronic vision impairment that is affecting your ability
to perform daily activities. You should schedule
an appointment with me at the Wilmer Eye Institute, Johns
Hopkins Bayview Medical Center in the ophthalmology department.


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