astigmatism axis cylinder

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astigmatism axis cylinder

Now, contact lenses correct astigmatism axis cylinder.

Astigmatism axis cylinder is a condition where the cornea is irregularly shaped causing distorted vision. Using a toric contact lens can correct this vision problem.

Ciba, a leading contact manufacturer of of contact lenses, offers a wide range of contact prescriptions to solve a variety of vision correction needs

Astigmatism is an eye condition known as a refractive error. Refractive errors change in the way that light rays are focused within the eye. Astigmatism often occurs with nearsighted and farsighted conditions also resulting from refractive errors.

Astigmatism is not a disease nor does it mean that you have "bad eyes." It simply means that you have a variation in the shape of your cornea.

What causes astigmatism?

Astigmatism often occurs when the front surface of the eye, the cornea, has an irregular curvature. The cornea is smooth and usually equally curved in all directions and light entering the cornea is focused equally on all planes, or in all directions.

In astigmatism, the front surface of the cornea is curved more in one direction than in the other. This may result in vision that is much like looking into a distorted, wavy mirror. The distortion results because of the inability of the eye to focus light rays to a point.

If the corneal surface has a high degree of variation in its curvature, light refraction can be impaired to the degree that corrective lenses are needed to help better focus light rays. At any time, only a small proportion of the rays are focused and the remainder are not, so that the image formed is always blurred. Frequently, astigmatism causes blurred vision at all distances. Some people with a very high degree of astigmatism may have cornea problems such as keratoconus.

Astigmatism is very common. Some experts believe that almost everyone has a degree of astigmatism, usually from birth, which remain the same throughout life. The exact reason for differences in corneal shape remains unknown, but the tendency to develop astigmatism is inherited. For that reason, some people are more prone to develop astigmatism than others.

Axis as mentioned above is a special cylindrical lens needed in order to correct astigmatism. Not only does the strength of the cylindrical lens need to be specified, but the lens itself must be rotated into a specific position in order to provide the proper vision correction. The axis represents the amount of rotation of the cylindrical lens in degrees ranging from 1 to 180.

Buy Astigmatism Contact Lenses

Torisoft contact lenses, a popular choice, by Ciba Vision offer a crisp clear vision for patients with astigmatism in a reusable daily wear lens. With proper care these lenses will last up to a  full year. 

Focus toric contact lenses from Wesley Jessen - Ciba is another chioce astgmatism. These contacts are designed to be replaced monthly

A toric lens is specially shaped and designed to provide 2 different powers to the eye to correct this vision problem. Focus torics are one of the most commonly prescribed planned replacement toric lenses.