As a result, people with this condition complain of blurred and distorted vision.
This refractive error occurs in about one in three people and may occur in combination withnear-or farsightedness.
Getting a comprehensiveeye examis the best way to diagnose astigmatism.
franckreporter / Getty Images
What Is Astigmatism?
While a normal cornea has a spherical shape, the area in people with astigmatism will be oval-shaped.
As a result, the images at any distance will become blurry.
Astigmatism triggered by an oval-shaped cornea or lens is regular astigmatism.
Irregular astigmatism can sometimes be triggered by injuries and scarring of the cornea.
It can also be the result of keratoconus.
How Do Doctors Test for Astigmatism?
Astigmatism is measured in units of diopters.
The last two numbers in your prescription refer to astigmatism:
Are Online Tests Reliable?
A number of online tests can help people see if they have astigmatism.
You will alternate covering your left and right eyes during these tests.
Online tests can be a first step toward identifying a potential problem with your vision.
To get a precise diagnosis of astigmatism, however, you have to be evaluated by an eye specialist.
The result from an online test relies on the person’s judgment and may not be accurate.
Online tests are not a replacement for an appointment with an optometrist or ophthalmologist.
A conventional eye exam will measure the astigmatism level and find other complications, such as myopia and hypertropia.
A specialist will also discuss the best way to treat the problem.
If you notice astigmatism symptoms, you’re able to use an online test to check your vision.
However, you should still visit your eye doctor for a proper evaluation afterward.
They can tell you definitively whether you have the condition and recommend the appropriate treatment.
The treatments for astigmatism are often affordable, including eyeglasses and contact lenses.
People who want to fix it permanently can also discuss the possibility of getting surgical treatment with their doctor.
American Academy of Ophthalmology.Eye Health Statistics.
2014 May;34(3):267-94. doi: 10.1111/opo.12128
American Academy of Ophthalmology.What Do Astigmatism Measurements Mean?
American Academy of Ophthalmology.How to Read an Eyeglasses Prescription.
