Refractive
errors that occur when the surface of your eye (cornea) is slightly
irregular in shape is called an astigmatism which results in vision
being blurred or distorted no matter the distances. Astigmatism
is a condition in which the cornea or lens is stretched into an
irregular shape. Instead of being round, the corneas with
astigmatism are often shaped like a football as opposed to round like
a basketball. This causes a refractive error; it distorts light as it
is entering the eye. This results in images appearing blurry. It is
important to know that astigmatism
is not a disease, but is a common refractive error.
What
causes astigmatism?
When
the front surface of the cornea or the lens inside the eye is more
oblong than round like a circle, light will not focus properly on the
retina that is located at the back of your eye. In some cases,
astigmatism may be hereditary or may be a result from such things as
pressure on the cornea.
If you have blurry vision it doesn’t automatically mean you have
astigmatism. It can possibly mean something else so it is recommended
to make an appointment to see your eye doctor immediately.
How
common is it?
There
are not many people that do not have astigmatism; most do have a
certain level of astigmatism. It is quite rare to have a perfectly
shaped corneal surface. Those with small degrees of astigmatism may
not even require correction with corrective lenses. However, anything
above this will need some sort of corrective lenses.
What
are the signs/symptoms of astigmatism?
Even
those with mild to moderate levels of astigmatism will usually find
they have blurred or distorted vision. They may experience straining
of the eyes, migraines, tiredness, unclear vision or distortion at
certain times.
Both youth with astigmatism and adults may have troubles when reading
text.
How
is it diagnosed?
An
eye exam by your eye doctor would include a wide range of tests that
would include checking for astigmatism.
Is
there anything for Astigmatism Correction?
Most
levels of astigmatism can be optically corrected with
properly
prescribed
and
fitted
eyeglasses
or contact lenses. Laser eye surgery is another option for those who
are candidates. Wavefront technology has helped with Astigmatism
Correction,
it is recommended to have your laser eye surgery done with Wavefront
technology.
Does
astigmatism get progressively worse?
Astigmatism
may change with time. Regular care from an ophthalmologist or
optometrist can, however, help to insure that proper vision is
maintained.