- January 22, 2025
Astigmatism is a defect in the refraction of the optical system of the eye. It causes blurred vision and reduced sensitivity to contrast, both from afar and near. Astigmatism requires cylindrical correction, but can also be treated with a laser procedure.
Necessity, or astigmatism, is a visual defect that causes blurred vision from near and far. In people with astigmatism, the rays of light that reach the eye form a line instead of focusing on just one point. Increasing visual impairment or improperly treated may significantly impair the quality of life and cause pain. As a result of unavoidability, the eyes have impaired rotational symmetry. In astigmatics, the shape of the cornea resembles a rugby ball rather than being regularly round, which corresponds to most cases of astigmatism.
Necessity can occur regardless of age or gender. If you notice that your eyesight is deteriorating, it is best to go to a professional ophthalmologist's office, where a specialist will conduct a thorough eye examination. The types of unreliability can be divided according to the arrangement of astigmatic axes in relation to each other, i.e. regular and irregular astigmatism. The first of these occurs most frequently. In regular astigmatism, the eye has non-rectangular optical axes and this is due to the abnormal shape of the cornea, which looks more like a rugby ball instead of resembling the shape of a regular sphere. Irregular necessity usually occurs later in life. Visual impairment may occur as a result of corneal or corneal cone damage. Lens astigmatism occurs relatively rarely and is based on the abnormal shape of the lens of the eye.
Necessity is measured in cylindrical dioptres. Most people have physiological astigmatism, which is 0.5 dioptres. A distinction is also made between low (up to 1 diopter), high (up to 2 diopters) and very high (above 3 diopters).
Typical symptoms of astigmatism include problems with spatial orientation, seeing straight lines as curves, blurred vision, and rapid eye fatigue during activities such as reading or working with a computer. Symptoms of low irresistibility can be virtually unnoticeable. However, if the eye defect increases, symptoms such as headaches, frequent blinking or rubbing of the eyes, tearing and recurrent conjunctivitis may occur. Astigmatism in children can also manifest itself in a reluctance to learn and read.
The most common cause of astigmatism are genetic conditions and autonomous defects, such as the cone of the cornea. Visual impairment may also occur as a result of mechanical injury to the eye, scars and damage to the lens or cornea of the eye organ.
The treatment of astigmatism is based on cylindrical correction. To improve the quality of vision, traditional glasses equipped with cylindrical glasses or toric contact lenses are used to correct most cases of impurities, especially those caused by the cornea cone, where they are the only effective method of treatment. Astigmatism can also be corrected by laser treatment. However, only persons over 20 years of age can benefit from surgical intervention.
