Astigmatism – What It Is, Causes, Symptoms and Treatments In this article, you will get all your doubts about this disease. Also, it has healing, but you first need to understand what it causes in your eyes . The Astigmatism is a visual change. It can result in blurred or distorted vision at all distances, regardless of the degree of illness.
Only when the rays of light pass into your eyes and focus on a single point of your retina at the back of the eye are the images transmitted to your brain through vision clear.
What is Astigmatism?
The astigmatism is a common refractive error, considered a malformation, ie, the condition in which the eye does not focus light evenly on the retina (the light sensitive tissue at the back of the eye).
For light is refracted differently depending on where it hits the cornea and passes through the ball of the eye. This will occur because a cornea extends into an irregular shape, causing as its main cause are the corneal irregularity and the distortion effect of the image.
Causes of Astigmatism:
Its real causes are still unknown. It is believed that it may also be related to genetic inheritance, as it is the most common cause. Another hypothesis is keratoconus, when a problem causes the cornea to be shaped like a cone.
Keratoconus is quite rare and severe, when it occurs, the doctor will indicate contact lenses or surgery. The astigmatism can also occur in conjunction with hyperopia or presbyopia .
It usually appears at birth and undergoes few changes during development. It may also arise after eye trauma and compromise the cornea after intraocular surgery or be related to other eye diseases, such as keratoconus.
Scratching the eyes may favor increased astigmatism , which may be associated with myopia , hyperopia, and presbyopia (tired eyesight), but not always affecting both eyes .
Generally, the patient may have the following symptoms and actions:
Squinting to see;
Asthenopia: the set of ophthalmic symptoms;
Difficulty seeing at night;
conjunctival hyperopia (red eyes);
Burning sensation in the eyes ;
Blurred or distorted vision at all distances.
The astigmatism can also be asymptomatic, especially in children. Already adults may have mild.
As we said most forms of astigmatism are easy to treat. You have several correction options. Some of these include:
Remember that when it comes to vision correction for astigmatism , not all options are equal;
If you are over 40 you may need multifocal or bifocal lenses;
Talk to your ophthalmologist about which option is best for you and your lifestyle.