What is astigmatism?

Astigmatism is frequently caused by a "football-shaped" cornea, which is more curved on one axis and flatter on the opposite axis. This results in two different focal points in the eye, either in front of or behind the retina. This visual defect can cause an uneven blur around an object or the impression of a split image.

Depending on the intensity of the curvature defect, astigmatism has different degrees. Also, astigmatism often goes hand in hand with hyperopia or myopia. In addition to blurred or doubled vision, astigmatism is signalled by eye fatigue, headaches and sensitivity to bright light. Only a complete eye exam can confirm whether you have astigmatism.

Can astigmatism be corrected with contact lenses?

Toric lenses to correct astigmatism

Toric contact lenses correct this vision problem by redirecting light rays to a single point on the retina. Your vision becomes clearer and more precise. As the name implies, astigmatism contact lenses are toric in shape, meaning they are thicker on the sides, allowing light rays to be deflected. Only an Optometrist can prescribe toric contact lenses. 

Characteristics of toric contact lenses. Unlike standard contact lenses that offer the same power, toric lenses offer two different powers in the curves: one for astigmatism, another for hyperopia or myopia. Also, an adaptation may be necessary because the lenses are asymmetrical and sometimes require stabilizers to stay in the correct position. 

What are the advantages of toric contact lenses?

The advantages of toric contact lenses are numerous. The first is aesthetic. Contact lenses are an interesting alternative for people who do not like wearing glasses. Discreet, they reveal the look. Visual comfort is also an advantage of toric contact lenses. They offer a clearer vision. In addition, the deployed stabilization technique offers lens stability in all circumstances. Thanks to the thickness of the lenses, they won't rotate even when you're playing sports or quickly changing the direction of your gaze.

In addition, toric lenses are popular because they offer two points of correction: astigmatism, and they also treat hyperopia or myopia. However, it is still recommended to alternate wearing contact lenses with glasses. Contact lenses should not be worn permanently. Remember to remove them every night to give your eyes a rest.

Make an appointment with your IRIS Optometrist to determine which contact lenses are suitable for your vision and lifestyle!