Astigmatism is a common optical problem that affects the vision of many people. In this article, we will explore what astigmatism is, how it is determined and what treatment options are available. We will also discuss the role of glasses, lenses and surgeries to correct these optical problems.
Definition of astigmatism – What is Astigmatism? How does it happen?
Astigmatism is a common optical deviation that occurs when the eye lens or cornea are asymmetrically curved. This asymmetry affects how light is reflected in the eye and affects the sharpness of vision. People with stigma may suffer from blurred or unilateral images, and their eyes may be sensitive to light. People with astigmatism may feel a slight discomfort, but glasses, contact lenses, and even surgery can offer positive results. The severity of astigmatism and the exact type of impaired vision vary considerably from person to person.
Causes of Astigmatism – What's the main cause? What other factors can cause it?
The main cause of astigmatism is the asymmetry of corneal curvature, which is the transparent outer part of the eyeball. Asymmetry causes disturbances in the beam of light entering the eyeball, resulting in blurred vision. Other factors that may cause this condition include the use of soft contact lenses over a long period of time, congenital abnormalities such as eye muscle dysfunction or keratocone, as well as eye injuries or surgical procedures. In addition, changes in intracranial pressure or complications related to medical conditions such as diabetes or lupus can also cause astigmatism.
Symptoms of Astigmatism – What are the most common symptoms?
The most common symptoms of astigmatism are the perception of a shift or distortion of near or distant objects. A blurred view of objects at all distances is also a common symptom. People with astigmatism usually have a double or distorted vision of recurrent objects and headaches. Other common symptoms include severe glare and headache, eye pain, excessive eye fatigue and sensitivity to light. People with stigma are also more likely to suffer from headache and fatigue after reading or prolonged computer work. A difficulty to see clearly from near or far is also a typical symptom of astigmatism.
Diagnosis of Astigmatism – What tests are used to diagnose astigmatism?
To diagnose astigmatism, ophthalmologists can use different techniques. An optometry, or eye examination, is the most common method. With this, the doctor will examine the eyes with an instrument called refractor. Using different glasses, the doctor is able to determine the degree of the person's view. It can also use another test called a background eye. In this test, the background is examined to see if the eyes are healthy. Other tests, such as corneal topography and refractive tests, are also used to diagnose astigmatism. These tests provide information on the shape of the cornea and the degree of refraction of the eyes. Finally, a background examination is also sometimes recommended to assess total eye health.
