Toric Contact Lenses
Astigmatism is a defect of the eye which is caused by either an irregular curvature of the cornea or by corneal scarring. Generally, people with astigmatism have a more oblong, rather than round, shaped cornea. The condition causes blurry vision, makes it difficult for people to see fine detail, and may cause vertical lines to appear tilted.
Many people with astigmatism are still under the impression that they cannot wear contact lenses. But with the invention of toric contacts, most men and women with astigmatism can now enjoy the same comfort and convenience of other contact lens wearers. Toric lenses are made up of two different corrective powers with curvatures at different angles in order to correct both the astigmatism and the nearsightedness (or farsightedness, as the case may be). While regular contact lenses can rotate in the eye without affecting vision, toric lenses need to remain centered in order to provide accurate vision. Therefore, many toric contact lenses are "weighted" (ballasted) at the bottom.
Like other kinds of contact lenses, toric contacts are available in a variety of options, including disposable, multi-focal, and color-changing.
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