What Is Cylindrical Power In Eye?

Are you curious to know what is cylindrical power in eye? You have come to the right place as I am going to tell you everything about cylindrical power in eye in a very simple explanation. Without further discussion let’s begin to know what is cylindrical power in eye?

Our eyes are remarkably complex, and their ability to perceive the world around us depends on various factors, including vision acuity and focus. One crucial element that plays a significant role in our visual health is the presence of cylindrical power, particularly in cases of astigmatism. In this blog, we will explore what cylindrical power in the eye means, how it relates to astigmatism, and the importance of addressing this condition for clear and comfortable vision.

What Is Cylindrical Power In Eye?

Cylindrical power, often referred to as cylinder or “cylinder power,” is one of the three components of a prescription for corrective eyewear, alongside spherical power and axis. These components work together to correct vision problems such as nearsightedness (myopia), farsightedness (hyperopia), and astigmatism.

Cylindrical power specifically addresses astigmatism, which is a common refractive error that occurs when the cornea or the lens of the eye has an irregular shape. Instead of having a round or spherical shape, the cornea or lens may be more oval, causing light to focus on multiple points on the retina. This results in distorted or blurred vision at all distances.

Astigmatism Is Categorized By Two Main Components:

  1. Spherical Power: This component corrects myopia (nearsightedness) or hyperopia (farsightedness) and is denoted as a plus or minus value, indicating the strength of the prescription.
  2. Cylindrical Power: The cylindrical power corrects astigmatism, denoted as a positive or negative value. It signifies the degree of astigmatism and how much correction is needed.

The Importance Of Axis

To fully address astigmatism, an additional component known as the axis is essential. The axis specifies the orientation of the cylindrical power. It is measured in degrees from 0 to 180, where 0 degrees usually represents the horizontal meridian of the eye. The axis tells eyecare professionals the direction in which the astigmatism needs to be corrected.

For example, a prescription might look like this: -2.00 -1.50 x 180. In this prescription, -2.00 is the spherical power, -1.50 is the cylindrical power, and 180 is the axis.

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Correcting Astigmatism

The purpose of addressing cylindrical power is to provide clear, crisp vision to individuals with astigmatism. Corrective lenses, such as eyeglasses or contact lenses, are prescribed to counteract the uneven curvature of the eye’s cornea or lens. These lenses are specially designed to redirect the incoming light so that it focuses properly on the retina, eliminating the blur caused by astigmatism.

For some individuals with mild astigmatism, toric contact lenses or glasses may be required only for specific tasks, such as reading or driving. Others with more significant astigmatism may need corrective lenses for all daily activities.


Cylindrical power in the eye is an essential aspect of correcting astigmatism, a common refractive error. The presence of cylindrical power in an eyeglass prescription indicates the degree of astigmatism and the amount of correction needed. Thanks to advancements in eyecare, individuals with astigmatism can enjoy clear and comfortable vision with the appropriate corrective lenses. If you suspect you have astigmatism or any vision issues, consult an eye care professional to determine the best course of action for your visual needs.


Is Cylindrical Power Good Or Bad?

Astigmatism is also known as the cylindrical power of the eyes. This is a refractive error where the shape of your cornea is more football-like And not of a symmetrical round shape. This changes the way the light passes your retina. Resulting in causing a blurry and fuzzy vision for you.

What Is The Normal Cylindrical Power Of Eye?

Normal eyes would typically have about 0.50 dioptres of negative cylinder or cyl power at an axis number of 180. Typically, most people have between 0.5 to 0.75 dioptres of astigmatism and won’t need contact lenses or glasses to see clearly. Those with astigmatism will have a dioptric power of 1.5 and above.

How Do You Reduce Cylindrical Eye Power?

Eye Exercises to Reduce Spherical or Cylindrical Eye Number

  1. Palming. The technique of covering both eyes gently with your palms is called palming. …
  2. Blinking. …
  3. The Figure of Eight or circular eye movements. …
  4. Convergence eye exercises. …
  5. Side-to-side movement.

Is Cylindrical Eye Power Curable?

Yes, vision correction surgeries can correct the cylindrical powers.

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