There are three types of astigmatism: myopic, hyperopic and mixed. Today there are treatments for all of them, ranging from the use of glasses to corrective surgery or the implantation of lenses in the eyes.
There are several types of astigmatism, but they all have one abnormality in common. This is that the cornea, which is the transparent layer of the eye, does not have a regular curvature. In this way, the light that enters the eye is focused on more than one point on the retina and this causes blurry and distorted vision.
In most cases, astigmatism is inherited, but it can also be caused by injuries to the cornea from a blow or surgery to the eyes, or from eye diseases. Sometimes this disease appears associated with other deficiencies and this gives rise to the different types of astigmatism.
Myopic astigmatism
Myopic astigmatism is one that is combined with myopia. It is the most common of all types and occurs frequently in the population.
The main sign that someone suffers from myopic astigmatism is that the perception of straight lines, both horizontal and vertical, becomes blurry and diffuse, both at short and long distances. For obvious reasons, the more severe it is, the more obvious the difficulty becomes.
Likewise, it is common for other symptoms to appear when this problem exists, such as the following:
Loss of visual acuity.
Photophobia: sensitivity to light.
Night glare.
Tiredness: eye fatigue.
Sudden dizziness and headaches.
Burning sensation.
We speak of simple myopic astigmatism when one of the two main meridians of the eye focuses the light rays in front of the retina; meanwhile, the other meridian makes a correct approach. If both meridians fail, it is called compound myopic astigmatism .
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