Advantages of using Toric Contact Lenses for Astigmatism

March 20, 2017

Many people commonly have this misconception that they can never wear contact lenses since they have astigmatism. Fortunately, the fact presently is that there are several effective options available for correcting astigmatism with the help of contact lenses. The phrase ‘toric contact lenses’ is generally used for exclusively designed contact lenses which help with astigmatism. Research on toric contact lenses market states that, most toric contact lenses available in the market are soft lenses that are made of superiorly breathable silicone hydrogel or conventional hydrogel material. However, there are toric lenses which are made out of rigid gas permeable (GP) contact lens materials. Normal contact lenses are spherical in shape, but toric lenses are shaped in a specific geometric way (slightly oval). This specific shape of toric contact lenses generated different focusing or refractive, powers of the horizontal as well as vertical orientations. The refractive strength of toric contact lenses decreases or increases slowly as the user moves around the lens. Spherical contact lenses consist of uniform power in all of its meridians, therefore when the user blinks the eye and the lens tend to move, it doesn’t really matter. However, toric lenses have different powers in different meridians; hence they must not rotate and move only in the vertical axis with every blink. These days there are toric lenses available in the market which are weighted at the bottom which refrain them from moving.

Toric soft lenses used only for treating astigmatism are different from the regular available contact lenses which rectify only hyperopia and myopia in two separate ways:

  • Toric lenses have a specific feature which lets the lens rotate to the precise orientation over the cornea just so the power meridians of the contact lens make parallel with the apt meridians of the eye for crisp clarity of the vision.
  • In order to correct the ranging amount of farsightedness and nearsightedness in varied meridians of the eye that portrays astigmatism, toric contact lenses comprise of different powers in different meridians of the lens.

Since each eye which has astigmatism is exclusive, it might take more than one pair of soft toric contact lenses to determine the exact brand and style which is best-suited and gives sharp-sightedness and comfort. Moreover, get used to toric lenses takes more than regular lenses, and that is why these lenses cost more than the regular ones. Owing to the complexity of the design and fit, the cost of the toric soft contact lenses might get higher or lower than the cost of the regular, spherical ones. Also, the difference cost-wise is associated with the design, material, and the manufacturer of the lenses that are purchased.