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Frequently Asked Low Vision Questions
What is low
vision? If your vision is not adequate enough to allow
you to do the things you desire, you may have low vision.
Low vision is the result of disease, injury, or an anomaly
of the visual system. Common causes of low vision in adults
are age-related macular degeneration, glaucoma, stroke, and
diabetic retinopathy. Other causes include, but are not
limited to, retinitis pigmentosa and albinism. A person with
low vision is one who has a visual acuity or visual field
impairment which cannot be made better medically or
corrected by conventional means and feels this impairment
has a negative effect on his or her daily activities. A
person who is not blind and yet cannot see as well as the
average person is referred to as partially sighted.
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Do all eye doctors
work in low vision? Not all eye doctors work with
patients in need of low vision rehabilitation. Low vision
specialists have a special interest in persons who are
visually impaired and usually have received specialized
training in this area.
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How does a low vision evaluation help the
patient?
The low vision specialist does not
cure the cause of low vision but rather enhances the vision
that remains. This is done using special low vision devices
that allow a person to improve the vision that they have by
making things easier to see. This is accomplished by
magnification or improving brightness, clarity, or contrast.
Optical devices include specialty lenses which enlarge
objects such as magnifiers, microscopes, and telescopes.
Enlargement of objects can also be achieved through the use
of electronic devices such as CCTV's and large print
computer software. Non-optical devices are also used and
include lamps, filters, large print and reading stands.
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What can I expect
at a comprehensive low vision evaluation?
- Lots of questions! Dr. Whitaker will ask about your ocular
and visual history, medications and general health, visual
limitations and visual goals, use of light and previous
experience with low vision devices.
- Evaluation of visual activity, visual field, and external
ocular health
- Determination of best spectacle prescription using
conventional lenses
- Evaluation for near and distance optical low vision
devices
- Evaluation for non-optical devices
- Comprehensive eye health examination including testing for
glaucoma and retinal health
- Training in the use of low vision devices
*Please note: All of this takes time! Expect at least
three or four one hour appointments with the possibility of
more.
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What are some of the common causes of low
vision?
- Age-related macular degeneration is found in the senior
citizen population. This disease causes degeneration of the
macula or area of fine seeing of the eye. The result is
decreased central or straight ahead vision, sometimes
devastatingly so, which affects a person's ability to read,
recognize faces and drive. Although treatment exists for
some forms there is no cure. There is hope that the
anti-oxidant, lutein, found in high concentration in spinach
and kale and some ocular vitamins may protect against this
disease.
- Diabetic retinopathy causes fluctuations in vision, the
feeling
of vision
going in and out and decreased central vision. Patients with
diabetes need to be seen by their eye care professional
regularly.
- In some cases, a stroke can affect
the visual field of persons making reading or driving
difficult. Prisms can be used to move images into areas of
seeing to help alleviate these problems.
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How do you measure success in low vision
rehabilitation?
Low vision rehabilitation takes time,
patience, determination, and lots of hard work. It also
takes a willingness to learn to do everyday tasks, such as
reading, in a new and different way. Success in low vision
rehabilitation is defined by only one person and that person
is the low vision patient. If he or she feels that they are
successful, then he or she is!
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