Top 10 FAQs About Astigmatism: Everything You Need to Know


Astigmatism is a common eye condition that affects how we see the world around us. Unlike the more straightforward issues of nearsightedness or farsightedness, astigmatism distorts our vision in unique ways, making everyday activities like reading a book or driving a car a bit more challenging.

In this blog post, we’ll demystify astigmatism by addressing the top ten frequently asked questions about it. Whether you’re someone who’s recently been diagnosed, or you’re just curious about this eye condition, we’re here to provide clear, concise, and useful information to help you see astigmatism in a whole new light.

1. What is astigmatism?


Astigmatism is a common vision condition caused by an irregular curvature of the eye’s cornea or lens.

Unlike standard refractive errors, which affect vision in one dimension, astigmatism distorts vision at all distances. This irregularity causes light rays to focus on multiple points instead of just one, leading to blurred or distorted vision.

Astigmatism is often present from birth and can occur in combination with nearsightedness or farsightedness.

2. What causes astigmatism?

Astigmatism usually stems from a genetically inherited irregular shape of the cornea or lens. The cornea, ideally spherical, is more oval in astigmatic eyes. This distorts light entry.

Environmental factors, such as prolonged eye strain or incorrect posture, can contribute but are not primary causes.

Astigmatism can also develop following an eye injury, eye surgery, or due to certain eye diseases.

3. How common is astigmatism?

Astigmatism is quite prevalent worldwide, affecting approximately 1 in 3 people to varying degrees. It can occur at any age but is often diagnosed in early childhood or adolescence.

Astigmatism frequently coexists with other refractive errors, like myopia (nearsightedness) or hyperopia (farsightedness).

Regular comprehensive eye exams are crucial since many people may not realize they have astigmatism until it’s professionally identified.

4. What are the symptoms of astigmatism?


Common symptoms of astigmatism include:

  • Blurred or distorted vision
  • Difficulty focusing on small print or fine details
  • Eye strain, headaches, and/or discomfort after visual tasks
  • Squinting or fatigue when trying to focus

These symptoms can vary in intensity, and in mild cases, a person might not notice significant vision impairment.

5. How is astigmatism diagnosed?

Astigmatism is diagnosed through a comprehensive eye exam, which includes a refraction test and keratometry. The refraction test helps determine the exact lens prescription needed to correct vision, while keratometry measures the curvature of the cornea.

Advanced imaging technologies, like corneal topography, can also be used to create a detailed map of the cornea’s surface. Optometrists and ophthalmologists are skilled in these diagnostic techniques, ensuring accurate detection and assessment of astigmatism.

6. How is astigmatism corrected?

Astigmatism is primarily treated with corrective lenses — eyeglasses or contact lenses — designed to counteract the uneven curvature of the cornea or lens.

Unlike standard spherical lenses, toric lenses have varying powers across different parts, aligning with the irregular cornea or lens to provide clear vision.

For higher levels of astigmatism, hard or rigid gas-permeable lenses may be more effective. These lenses maintain their shape, offering sharper vision by compensating for the cornea’s irregularity.

For a more permanent solution, laser eye surgery, such as LASIK (laser-assisted in situ keratomileusis) or PRK (photorefractive keratectomy), can reshape the cornea. Note that the choice of treatment depends on the severity of astigmatism and individual patient needs.

7. Can astigmatism worsen over time?

Astigmatism can change over time, often worsening with age. Factors like eye growth, natural lens aging, or eye health conditions can influence its progression.

In some cases, significant lifestyle changes, eye injuries, or eye surgeries may also impact astigmatism severity.

Regular comprehensive eye exams are important to monitor these changes, as timely adjustments in vision correction can be essential for maintaining overall eye health.

8. How does astigmatism affect daily life?


Astigmatism can affect daily activities, especially those requiring sharp vision.

Challenges may include difficulty reading small print, eyestrain during prolonged computer use, and issues with night driving due to glare and halos around lights. For children, uncorrected astigmatism can impact learning and sports.

However, with proper correction through glasses or contact lenses for astigmatism, most people lead normal lives without significant limitations. Awareness and regular eye check-ups are key to managing astigmatism’s impact effectively.

9. Can astigmatism be prevented?

The short answer is there’s no definitive way to prevent astigmatism. This is because it’s often hereditary.

However, maintaining good eye health can help. This includes regular eye exams, proper eye protection, managing chronic conditions like diabetes that can affect eyesight, and avoiding activities that strain the eyes excessively.

While these practices might not prevent astigmatism, they contribute to overall eye health and can help in the early detection and management of any vision changes.

10. What are the long-term prospects for someone with astigmatism?

With proper diagnosis and treatment, the long-term outlook for individuals with astigmatism is generally very positive.

Prescription glasses or contact lenses can effectively correct vision, and surgical options can provide more permanent solutions.

It’s important to have regular eye exams to monitor any changes in the condition. Untreated, severe astigmatism can lead to eyestrain and headaches, and in children, it can affect vision development. However, with ongoing management, most people with astigmatism enjoy good vision and quality of life.


Understanding astigmatism is key to managing its effects on our vision and daily life.

Whether through corrective lenses, contact lenses, or surgery, there are multiple ways to achieve clear vision with astigmatism. We encourage anyone experiencing vision problems to consult with an eye care professional.

Remember, with timely care, astigmatism is just a small bump on the road to clear vision.