Astigmatism is a common and generally treatable imperfection in the curvature of the eyes that causes blurred distance and near vision. It is often associated with other visual disorders such as myopia or hyperopia. In France, 15% of the population suffers from astigmatism.
We can diagnose astigmatism during a complete eye examination. Testing may include:
The eye has two curved structures called the cornea and the lens that bend or refract light onto the retina, which makes the image that you see. In a perfectly shaped eye, each of these elements has a round curvature like a smooth ball. A cornea and lens with such curvature refract all incoming light equally to make a sharply focused image directly on the retina. If either your cornea or lens is egg-shaped with two mismatched curves, light rays aren’t bent the same, which forms two different images. These images overlap or combine and result in blurred vision. Astigmatism occurs when your cornea or lens is curved more steeply in one direction than in another. It is not known what causes astigmatism, but genetics is a big factor. It may also occur as a result of an injury to the eye or after eye surgery. It often occurs with near-sightedness or far-sightedness.
Astigmatism symptoms may include:
If you have astigmatism, you have a wide range of options to correct your vision problem. There are three main ways to treat astigmatism: glasses, contacts, or refractive surgery. Eyeglasses and contact lenses work by refocusing light on the retina in the back of your eye so that you can see more clearly. Having surgery is the only way to permanently correct astigmatism. However, your type and degree of astigmatism, corneal thickness, age and other eye conditions are all factors in whether surgery is the best option, and if so, which type of surgery.
We practice two techniques here to correct your astigmatism: We use a laser to regularize the shape of the corneal surface, or we can insert an implant that optically corrects the defect. It is possible to treat astigmatism on its own, or alongside another visual defect such as myopia hyperopia and/or presbyopia. The treatment of astigmatism is therefore carried out simultaneously with the associated visual defect being myopia, hyperopia and/or presbyopia using the same operating method, either laser or implant.