Astigmatism: All That is There to Know

In most discussions concerning common eye problems, Astigmatism finds its place. Like myopia and hyperopia, Astigmatism is a common refractive error. It is usually present at birth but may occur later in life due to an injury or surgery on the eye. It is the condition in which light falls on multiple focal points instead of a single point of focus on the retina. This is caused due to unevenly curved cornea – the part of the eye responsible for focusing light on the retina.

Since 9 out of 10 people have certain degree of Astigmatism, knowing all about it is imperative. Let us walk you through all there is to know about this sly eye-condition.

What causes Astigmatism?

Astigmatism is the result of misshaped cornea that leads to uneven refraction of light resulting in distorted vision. While the exact reason behind the condition is unknown, some studies have proved that genetics play an important role in Astigmatism.

What are the types of Astigmatism?

Astigmatism can be broadly categorised into Corneal and Lenticular. Corneal Astigmatism is caused due to an imperfection in the curvature of cornea resulting in distorted vision while Lenticular Astigmatism results from misshaped eye-lens causing blurred eyesight. Corneal Astigmatism can be further sub-classified into Regular and Irregular, depending upon the shape of the curvature of the cornea. Condition where the corneal bend is unidirectional is called the Regular Corneal Astigmatism as opposed to Irregular Corneal Astigmatism wherein the corneal surface is bent in more than one direction. 

What are the symptoms of Astigmatism?

Though Astigmatism is barely noticeable, its advanced stage may result in either any or all of the following:


•    Blurred vision at all distances
•    Strained eyes 
•    Headache after long hours of visual tasks
•    Excessive Squinting and sensitivity to light
•    Difficulty seeing one colour as against others
•    Double vision


How can Astigmatism be cured?

The most common way to rectify the disorder is the use of corrective lens called toric lenses. These lenses have the “cylinder” element with higher light bending power towards one of the axis as compared to the rest. Corrective soft contact lenses can also be used to treat regular and irregular astigmatism. Another option to correct this eye-condition is by changing the curvature of the cornea through refractive surgery or LASER treatment. 

Several healthcare providers as well as medical insurance companies in India strive to impart ample knowledge about eye health considering the increasing healthcare concerns across generations. Regular eye check-up coupled with a healthy lifestyle is the permanent solution to all raging health problems.

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