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Presbyopia is experienced
by everyone as they age. However, most people do not notice any
significant problems until they are 40 to 50 years old. This is when
they usually require reading or bifocal glasses for close work. In a
normal eye, the lens changes shape when you look at close or distant
objects. When you focus on objects at close range, eye muscles
constrict and the lens thickens. During the aging process the lens
becomes harder and less flexible, making it difficult to focus on
close objects. Farsighted individuals may notice symptoms at an
earlier age. Although this is a gradual process, it may seem
sudden. As the lenses of the eyes lose their flexibility,
periodic prescription changes are required, especially in the first
few years of presbyopia.
Symptoms can
include: objects blur at near, difficulty focusing back and forth
from close and far distances, need to hold reading material far away,
increased need for good light while reading
Glasses may be
simple reading glasses, bifocals, or multifocals. Contact lenses are
possible in some cases.
To date, there
is no way to prevent presbyopia.
Lens
choices for presbyopia.
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