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What is Astigmatism?- Causes, Symptoms & How to treat it?

Cylindrical number is nothing but one of the refraction or focusing defects, which is known as Astigmatism. Astigmatism is similar to nearsightedness (myopia) or farsightedness (hyperopia). These three disorders are referred to as refractive errors because they affect the way light is bent (refracted) by your eyes.

Astigmatism is one of the eye disorders in which the cornea, or the clear front portion of the eyeball, is not perfectly spherical. Ideally, an eyeball would be perfectly round. It allows light to enter and bend evenly, providing a clean perspective.

However, if your cornea is more shaped like a football, light is bent in one direction more than the other. This indicates that only a portion of an object is in focus. As a result objects start to appear fuzzy and wavy at a distance.

Astigmatism is frequently found in conjunction with nearsightedness (myopia) or farsightedness (hyperopia).

What causes Astigmatism?

An interesting fact is that the majority of people are born with Astigmatism. However, it can also occur as a result of an eye injury, an eye condition, or surgical intervention.

A condition known as keratoconus, which affects the transparent front part of your eye (the cornea), can cause Astigmatism in some people by making the cornea thinner and more cone-shaped.

A person who suffers from Astigmatism has a corneal surface that is shaped like an American football or a bottle gourd, with a curvature that is not equal on both axis. As a result, distinct rays of light entering the eye are focused at different locations, some in front of the retina and some behind it. This results in a hazy image in both close and far range, which may also be warped to some extent.

Symptoms of Astigmatism

The most typical symptoms of Astigmatism include:

  • Blurry or distorted vision

  • Eyestrain

  • Headaches

  • Trouble seeing at night

  • Squinting

The Prescription Measurements for Astigmatism

Your doctor might prescribe any of the following:

OD: stands for Oculus Dexter, which is your right eye.

OS: stands for Oculus Sinister, which is your left eye.

OU: stands for Oculus Uterque, which is for both eyes.

The first set of numbers represent diopters, which are measurements of the distance between two points.

  • If it has a minus sign next to it, you are shortsighted.

  • If there's a plus sign, you're farsighted.

  • A higher score indicates that the vision is blurrier.

The second set of numbers represents your cylindrical correction that demonstrates how severe your Astigmatism is.

The third factor is the axis, which refers to the location of the Astigmatism on your corneal surface.

Here is an example:

If your right eye has a prescription of "OD -1.00 x -2.00 x 155", it signifies that your right eye has 1 diopter of nearsightedness and 2 diopters of Astigmatism at 155 degrees on the cornea of your right eye.

Treatments for Astigmatism

Long gone are the days when patients with Astigmatism were considered ineligible for refractive operations; today, there are numerous solutions available, which your eye doctor can assist you in selecting from. Here are some of the best treatments for cylindrical number:


Prescribed glasses is one of the options for cylindrical number or Astigmatism. Correction of Astigmatism with glasses necessitates the use of a particular cylindrical formulation, and the glasses produced in this manner are identical in appearance to ordinary glasses for near or farsightedness.

Contact Lenses

Patients who do not prefer to wear glasses are frequently prescribed special contact lenses by their doctors. Regular soft contact lenses can correct mild to moderate Astigmatism, whereas specialist toric soft contact lenses can correct mild to moderate Astigmatism.

However, people with severe Astigmatism are suggested to use RGP lenses, which are rigid gas permeable lenses.

LASIK Eye Surgery

LASIK is one of the best ways to correct vision errors, including Astigmatism. LASIK can correct both spherical and cylindrical errors in the same eye simultaneously. It is a procedure in which the cornea is reshaped on the basis of the corneal topography that already exists. The LASIK machine is connected to a cutting-edge computer that can be programmed to correct each axis with exceptional precision and accuracy. Make sure to choose a reputable clinic for your Laser Eye Surgery in Delhi.

Contoura Vision Lasik Surgery

Contoura vision surgery, also known as Topography-guided LASIK surgery, is the most advanced vision correction surgery. The procedure is comparable to LASIK, but the technology used is different. A thorough eye examination is performed to rule out any infectious diseases. The procedure is done under local anesthesia.

Contoura Vision Lasik Surgery is a topography-guided Laser Correction that maps as much as 22,000 data points on the cornea and corrects them with customization, resulting in the kinds of visual results that were previously thought to be impossible to obtain.

SMILE Laser Eye Surgery

SMILE, also known as minor incision lenticule extraction, is one of the effective treatment choices for individuals with Astigmatism. Since SMILE is a minimally invasive laser eye surgery, it is appropriate for a wider range of patients than LASIK. SMILE is considered best for people who have been advised they cannot have other types of surgery.

One of the primary distinctions between SMILE eye surgery and other procedures like LASIK is that no flap is generated during the SMILE process. This eliminates the danger of issues such as flap folding or shifting, and it also makes the eye more comfortable following the treatment.

Which is the best treatment option for cylindrical numbers (Astigmatism)?

As is true for any other medical condition, the best person to talk to about your vision problems is your ophthalmologist. Your doctor will be better able to tell you the best treatment for your vision correction.

So, if you think you are suffering from Astigmatism or have any of the symptoms mentioned above, it's advised to visit a reputable eye specialist. Your doctor will first examine your eyes, after which he will assist you in selecting the most appropriate treatment or Laser Eye Surgery in Delhi.

You may decide to use glasses or contact lenses or seek a more permanent solution to your vision problem.

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