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ARMD (Age-Related Macular
Degeneration)
Many studies have shown that of the five human senses, people
overwhelmingly fear the loss of vision the most. ARMD at present
is the leading cause of irreversible central vision loss for
people over the age of 65 in the United States. It is generally
a slow, progressive, painless condition which affects the
macula, the small central part of the retina, that allows
a person to see fine details clearly. A far smaller number
of individuals will have a more sudden and severe loss of
vision as a progression of their ARMD.
The leading risk factor remains increasing age. Up to 37%
of individuals over 75 have some form of ARMD. Other factors
may include diet and nutrition, UV light from the sun, smoking,
heredity, light skin color, and heart disease. Detection involves
yearly examination once past the age of 60 and includes central
and peripheral visual field testing along with dilation of
the pupils to directly look at the retina/macula.
Treatment represents an extensive discussion of modalities
dependent upon the stage of ARMD in which the patient presents.
Such modalities include protection (UV sun glasses), diet
(green leafy vegetables such as spinach versus nutritional
supplements such as zinc, vitamins A, C, and E, lutein and
zeaxanthin), laser surgery (direct laser therapy versus photodynamic
therapy), intraocular surgery (macular translocation versus
submacular surgery). Finally, there are low vision aids such
as special glasses, magnifiers, video screens, etc.
Nutritional supplements are at present a popular, yet unproven,
mode of therapy. They have not been shown to be preventative,
and do have side effects, which can cause disease or exacerbate
existing diseases. They are therefore recommended only for
patients with progressive and/or severe forms of ARMD.
Direct Laser Therapy and/or Photodynamic Therapy are used
to halt the progress of choroidal blood vessels (sub macular).
It is the leakage of these blood vessels that causes the more
sudden and/or severe form of central vision loss. Candidates
for these treatments are determined soley by Flourescein Angiography
performed by a retinal specialist.
Although, we do not at present have anything that completely
prevents and/or treats this disease, there is a lot of ongoing
research and development which provides a great deal of hope
for the near and distant future.
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