It wasn’t always the case, but nowadays a person with astigmatism can use a selection of soft toric or hard contact lenses to correct their eyesight. So what does a “Toric lens” mean?. Toric refers to the lens’s physical and optical construction, as in the “torus” shape, shown below, to the right, as a rugby ball shaped lens. In optical terms, a toric lens is one in which either or both of the optical surfaces have the effect of a cylindrical lens, ie the lens has two powers, achieved by using curvatures at different angles, so that a lens can deal with astigmatism and myopia.

Toric contact lenses are made from the same materials as normal  contact lenses, and can be either soft or rigid construction (RGP). Some may have a preference for RGP types, as they retain their shape on the cornea better than soft lenses and tend to provide a clearer or crisper vision.

Some care is required when fitting toric contact lenses, as to work well they are designed not to rotate and must remain relatively stable over the eye. Torics are also available as cosmetic contact lenses, either as disposable, or more commonly as a non-disposable type lens.

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