What can cause astigmatism


What is astigmatism?

If the cornea of ​​the eye is not evenly shaped, it is called astigmatism. This is not unusual, many people suffer from it, especially those who wear glasses. With a slight curvature of the cornea, the symptoms are sometimes so poor that no correction is necessary. However, those who are nearsighted or farsighted usually also have an astigmatism.

Signs and symptome

These symptoms indicate an astigmatism:

  • Blurred or distorted vision near and far
  • Blurred vision in the peripheral areas
  • Blurred vision between horizontal and vertical lines
  • a headache
  • Tired, strained eyes
  • Difficulty reading
  • General fatigue, especially when working at the computer for long periods of time or when reading

What causes eggne astigmatism?

Astigmatism is usually congenital, but it can also result from an injury to the eye. As a result, the cornea and lens are no longer properly shaped and can therefore not focus the image on the retina.

This is how das eye

In order for us to see properly, four parts of the eye must work well together:

  • TheCorneaand thelenson the front of the eye; they work like a camera lens and focus the light on the retina
  • TheRetina(Retina) made up of light-sensitive cells in the back of the eye; it perceives light and color and converts them into electrical impulses
  • TheOptic nervebehind the eye; it sends the electrical impulses to the brain

Cornea, lensand eye shape

If the eye is correctly shaped, the lens focuses the light entering through the cornea directly on the retina. With astigmatism, however, the cornea is irregularly shaped. Incident light is refracted in various directions and cannot be displayed correctly on the retina. The result: people see blurred or distorted.

How is a corneal vercurvature detected?

For eye health, it is important to have yourself checked regularly by an ophthalmologist. Astigmatism is also diagnosed here. Because it can be congenital, eye exams and eye tests are especially important for children. Untreated astigmatism can lead to sluggish eyes and not only impair the child's sharp vision at school. Adults should have their eyes checked at least every two years.

How is an Hastigmatism treated?

If the astigmatism is symptom-free, there is no need to adjust vision. In some cases, however, the impairment can be considerable, in which case it is important to have prescription lenses fitted by an expert. They compensate for the irregular curvature of the cornea and ensure that the image is created directly on the retina again. Contact lenses can also effectively compensate for astigmatism - however, children in particular should be made aware of the importance of adequate hygiene.