What is astigmatism?
People with astigmatism do not see clearly, either up close or far away. This visual defect is caused by a deformation of the cornea (the front part of the eye) or by an alteration of the internal structures, such as the crystalline lens. Instead of being perfectly spherical, the cornea of astigmatism is often flattened, causing a distortion of light rays and making images blurry.
What causes astigmatism?
The exact causes of astigmatism are not yet fully understood, but in most cases it is linked to hereditary factors. If you have difficulty seeing clearly, it might be useful to take a look at your family tree! In some cases, however, it can be caused by eye trauma or by conditions such as keratoconus , a disease that makes the cornea cone-shaped.
How to recognize astigmatism?
The most reliable way to diagnose astigmatism is to have your eyes checked by an optician or ophthalmologist. However, you can do a preliminary test at home with this simple test:
Look at this "star" with one eye at a time. If all the rays appear equally sharp, your vision is probably uniform. If you notice differences in sharpness in some directions, you may have astigmatism!
Note: This test is not a substitute for a specialist visit, but it can give you an initial clue.
Types of Astigmatism
Astigmatism is classified according to the structure involved:
- Corneal astigmatism: Caused by an abnormality in the curvature of the cornea.
- Lenticular astigmatism: It results from internal alterations, such as the crystalline lens.
Can you be shortsighted and astigmatic at the same time?
Yes, astigmatism can coexist with myopia , hyperopia or presbyopia . It is a condition that often combines with other visual defects, making personalized correction even more important.
How to correct astigmatism?
There are two main solutions to improve vision in astigmatism:
- Prescription eyeglasses: Specific lenses compensate for corneal distortion.
- Contact lenses: Also available in toric versions, designed for astigmatism.
In some cases, for more advanced corrections, refractive surgery may be considered, but a specialist consultation is always necessary.
Protect your eyesight with Ottica Paoletti
Do you live in Pieve di Soligo or the surrounding area? At Ottica Paoletti we offer accurate eye exams and personalized solutions for astigmatism. Book a visit and discover how to see the world with new eyes!