Astigmatism

What is astigmatism?

Many people who need corrective eyewear have some level of astigmatism. It causes blurred/distorted vision and happens when the cornea is shaped in an irregular curve, similar to a rugby ball and not a circular curve like a football. This means that any light rays entering the eyes will not be focused properly, resulting in a blurred image. It is very common and can be detected with a regular eye exam.

Astigmatism that goes untreated can lead to eye strain, usually after doing tasks that require long periods of focus, or viewing distant objects. Eye strain is commonly followed by headaches.

Like myopia (short-sightedness) and hyperopia (long-sightedness), astigmatism is a refractive error. If you have astigmatism, it is likely that you have one of these two conditions. In some cases, astigmatism can also develop after an eye injury or as the result of complications after eye surgery. Sometimes, the symptoms of the condition are mild enough that no treatment is required.

The different types of astigmatism

There are two variations of astigmatism – regular and irregular.

Irregular astigmatism occurs when the curvature of the cornea is not even across the surface of the eye. The curve may be steeper towards the bottom, curved in multiple directions, or mostly positioned in one direction.

Where regular astigmatism occurs, the cornea will be curved more in one direction than another. Most people wear prescription glasses or toric contact lenses to correct their astigmatism. A more permanent, yet invasive, option is laser treatment.

How can I correct my astigmatism with contact lenses?

Fortunately, there are a wide range of toric contact lenses that correct astigmatism.

These offer an additional ‘cylinder’ power on a different meridian of your lens than the normal (spherical) power of the lens, essentially correcting the different degrees of short-sightedness or long-sightedness that your astigmatism causes.

With a torus shape design that offers stability and proper rotation on the cornea, toric contact lenses ensure undistorted and uninterrupted vision.

If you have any questions about toric contact lenses, speak to our dedicated and knowledgeable customer service team on 01 514 3614 or email us at cs@feelgoodcontacts.ie.

Quick links:


Can you be short-sighted and have astigmatism at the same time?
How do toric contact lenses work?
The ultimate guide to astigmatism