Astigmatism is one of the common eye conditions that directly affect the vision. This eye condition mostly occurs in the cornea or inside the lens, affecting the distance or near vision. Many people experience blurred vision when they see things. It can occur at the time of birth or because of specific conditions. Most doctors recommend eyeglasses, lenses or surgery to treat it.
What are the Various Types of Astigmatism?
The main types of astigmatism can be corneal and lenticular (lens). Corneal astigmatism is the name for a defect or an irregularity that occurs on the cornea. A usually unnoticeable lenticular astigmatism occurs when the lens gets some distortion.
Astigmatism is sometimes called regular or irregular as well. Regular astigmatism takes place during the lack of complete equality of the eyeball curvature. Since the moon is probably irregular in shape and not circular like a basketball, it may take a shape like a football. Usually it is the case that objects appear chequy and shady.
In addition, an astigmatism that is less frequently misaligned is when the eye is not entirely round. The eye, however, has an irregular astigmatism since it is crookedly curved. This type of astigmatism does not appear the same as in regular astigmatism. This defect and the abnormal field of view also result in distorted vision and blurred eyesight.
What Is the Main Factor for Astigmatism Development?
The main reason for astigmatism is that the cornea or lens does not have the same shape as normal lenses. The cornea and lens do not have one shape, and it is unknown why they vary from person to person. However, additive genes can be passed from generation to generation, causing astigmatism.
People can also get astigmatism from:
- eye disease
- eye injury
- or after surgery
To know what is the actual cause behind astigmatism, it would be better for you to get your eyes checked by an Optometrist, Katy.
What Effect Does Astigmatism Bring to Vision?
Typically, the cornea and lens are evenly round at the front of and in the eye. This enables an eye to focus rays of light on the retina so that objects can be seen clearly.
Through astigmatism, incoming light rays do not focus properly (or do not converge properly) as they pass through the front portion of the eye. The ray of light either falls short of the retina or continues behind it, so the vision becomes blurry both near and far.
People may have astigmatism along with other refractive errors, such as nearsightedness (myopia) or
farsightedness (hyperopia).
Symptoms of Astigmatism
Astigmatism symptoms may include:
- the inability to view an object or see objects in clearly outlined form.
- Eyestrain
- Headaches
- Taking a few steps forward and backward, trying to get a clear view.
- Eye discomfort
Symptoms of astigmatism are not all the time visible to the affected person. Make a visit to your ophthalmologist to do a detailed eye exam in order to determine why you have those symptoms.
Who is At Risk of Developing Astigmatism?
As astigmatism, it can be present at different ages, from kids to adults. Your risk of developing astigmatism may be higher if you have any of the following:
- Genetic history among family members of keratoconus (corneal degeneration), for example, or astigmatism (where the light does not focus properly due to the shape of the lens).
- Blotching or thinning of an intact cornea.
- Excessive nearsightedness, which makes distant images appear blurry, can be treated effectively.
- Excessive far-sightedness, which is common among children, results in a blurred vision of nearby objects (myopia).
How is Astigmatism Diagnosed?
A diagnosis of astigmatism is made by either an optometrist or an ophthalmologist during a routine eye exam. A competent optometrist is a person who performs eye examinations to diagnose vision problems as well as eye diseases. There are a few tests that an optometrist or an ophthalmologist may use as they diagnose astigmatism as part of an eye examination. For those considering corrective surgery, finding the best laser eye surgeon is crucial for optimal results.
Visual Acuity Assessment Test
When you are given an assessment test by a doctor that determines visual acuity during the visual acuity test, your doctor asks you to read letters from a chart at a specific distance and tells you then how well you see these letters.
Refraction Test
An optical refractor is a device that differentiates or tests the refraction levels in the eye. These are the parts of the instrument that correct the vision. The eye specialist will direct you to read a chart and look into a machine that will give the lenses different strengths from the optical refractor. In the meantime, they will locate that frame that does justice to your eye wear.
Keratometry
Keratometry is a recording technique used by your eye doctor to assess the curvature of the cornea. They will put your eye in front of a keratometer. Here they will measure the curvature of the eye.
