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Shady Grove Eye and Vision Care Dr. Alan N. Glazier
Optometrist |
| For Appointment or General Info, Contact Us
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15200 Shady Grove Road
Suite 100 Rockville, MD
20850 Tel: (301) 670-1212 Fax: (301)
216-9692
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Why are my arms to short to read?
Inside of the eye is a structure called the [Lens]. The [Lens]
helps the eye to focus, like a lens in a pair of eyeglasses may help
someone to focus. Our Lens allows for us to focus or unfocus, enabling us
to view objects at different distances. The Lens of our eye is more
dynamic than [eyeglass lenses]. Viewing distance objects requires the eye
to relax the Lens, decreasing lens convexity. Viewing near objects
requires an increase in convexity of the lens, creating more focus power.
This provides us with magnification for close object viewing. From the age
of 11, the ability of the lens to change convexity when viewing from
distance to near slowly decreases. At first changes are slow. As we
approach the age of 40, the ability of the lens to focus on near objects
has greatly decreased and within the next 3 years, most people who still
can see clearly when viewing distant objects are not able to see print
within arms reach. They must hold the newspaper or novel further and
further away to see clearly, until they would need to hold the print
beyond their fingertips to see it clearly.
The arms have become
too short. This phenomenon is known as [Presbyopia]. [Presbyopia] is a
condition affecting every person cross-culturally who lives past the age
of 40-43. There is no surgical treatment for the condition. The options to
help with [Presbyopia] are [bifocal eyeglasses], [contact lenses] or
[laser vision correction] modified for [monovision] (one eye for near, one
eye for far).
Nearsighted
[Nearsighted] people can read very well without eyeglasses or
contact lenses well past the age of 40-43. If their distance vision is
corrected to 20/20 with [eyeglasses], they will need additional power in
the bottom half of the lens to read. This additional power is known as the
"[add]" of the lens. The whole lens is known as a [bifocal] (bi-focal, or
two focal points). If the patient above 40-43 is corrected to see clearly
at distance with [contact lenses], they will need additional power over
the contact lenses in the form of [eyeglasses] to see near objects. For
[contact lens] wearers, contact lens prescriptions may be modified so that
one eye is corrected for close work and the other eye for distance
viewing. This is called [monovision]. [Bifocal contact lenses] are also
available.
Farsighted
[Farsighted] [(Hyperopia)] implies ability to see well far away,
while having difficulty at close. People who are farsighted need help
viewing objects at close distances at an earlier age than 40. Since
farsighted people have a disadvantage seeing up close even before
experiencing [Presbyopia], they need help with near vision earlier than
nearsighted people. And get this, people who are very tall, or have long
arm length may actually delay needing help of near addition lenses longer
than someone with a shorter arm length, literally because their arms are
longer! So no, your arms aren't too short, it's your eyes that aren't
powerful enough anymore. Additional magnification for people needing
assistance for reading, computer work or close work can come in the form
of [Reading glasses], [Bifocal lenses], [Trifocal lenses], a [Multifocal
lenses], [Monovision Contact Lenses], [Bifocal Contact lenses] or
Monovision [Laser Vision Correction]. presbyopia, presbyopia.org,
presbyopiafyi, presbyopiafyi.com, presby, farsight, farsighted,
farsightedness, bifocal, bifocal, bifocal vision
For more information on Presbyopia please visit www.content-plus.com/ae.
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