Toric contact lenses are specifically designed to provide visual correction for
individuals with
astigmatism. Most patients who are astigmatic also have either myopia (nearsighted) or hyperopia (farsighted). These
lenses are manufactured with more than one refractive power in order to correct
for both the astigmatic condition as well as myopia or hyperopia.
Fitting patients with toric contacts is not always an exact science and may require
more than one office visit. If additional visits are required, there is no additional
charge, as the cost of the Contact Lens Exam includes all follow up visits.
We work with our patients to ensure the best possible fit, clarity of vision, and
maximum comfort.
How They Work:
Because torics have at least 2 different powers, it is essential that the lenses
are fit properly so that they maintain a specific position on the surface of the
cornea. In
order to maintain this position, some lenses are made with a prism ballast (weighted
area within the lens) that rely on gravity to hold them in place. In the case of
Rigid Gas Permeable (RGP) lenses,
Back-Surface Toric lenses are formed with a curvature on the interior surface that
is made to match the irregularities of the individuals cornea. This provides a more
accurate fit and keeps the lens in the correct position.
Other Options:
Patients with mild astigmatism are not always limited to wearing toric contacts.
In some cases, the doctor may prescribe
standard spherical lenses with a slightly higher refractive power
in order to compensate for the astigmatic condition. RGP lenses may also be used
because their "stiffness" acts to shape the cornea to a small degree and may correct
mild to moderate cases of astigmatism (RGP lenses may help mask up to 3 diopters
of astigmatism).
