If your astigmatism prescription keeps getting stronger, you’re not alone – it’s actually a common frustration for many as they navigate different stages of life. While we’d love for our eyes to pick a shape and stick with it, the reality is that the eye is a dynamic organ that can change over time. Managing astigmatism effectively is vital because sharp vision is the backbone of daily life, influencing everything from the ease of your morning commute to your productivity at work and your physical safety.
The best defense is a proactive offense. Regular, comprehensive eye exams allow your optometrist to track these changes and rule out more serious issues. Whether it involves upgrading to high-precision Toric lenses, exploring specialized contact lenses or considering refractive surgery, you don’t have to settle for a blurry world. Keeping your glasses prescription up to date ensures your brain isn’t working overtime just to process the world around you.
What is astigmatism?
Astigmatism is a common vision condition where the eye’s cornea or the lens inside your eye isn’t perfectly round. Instead of being shaped like a basketball, it’s shaped more like a football. This uneven shape refracts light in different directions, causing blurry or distorted vision. According to Karen Allison, MD, an ophthalmologist and Associate Professor of Clinical Ophthalmology at the University of Rochester – Flaum Eye Institute, “Astigmatism can become more severe when the curvature of the cornea or lens becomes increasingly irregular.”
What’s happening in your body
As explained by the National Eye Institute (NEI), astigmatism is a type of refractive error. So, the eye isn’t bending light properly. It can happen at any age, and people who have it might also be diagnosed with nearsightedness (myopia) or farsightedness (hyperopia). Instead of focusing on a single point on the retina, light spreads out over multiple points, creating blurred or distorted vision at both near and far distances.
Astigmatism is often hereditary, but according to a study published in Eye: The Scientific Journal of the Royal College of Ophthalmologists, genetics plays a role in how the cornea develops and maintains its shape. For most people, astigmatism can usually be corrected with glasses, contact lenses or surgery. Having it doesn’t mean a person will go blind, and most people can manage it successfully with routine eye exams and prescription adjustments.
Causes of astigmatism
Astigmatism is usually caused by the cornea being more oblong than round. Some people are born with it, while others develop it over time. The exact reason the cornea becomes uneven isn’t fully understood, but experts know that genetics is a major factor.
Eye injuries or surgery can also change the shape of the cornea. For example, scarring from trauma can cause uneven curvature. Certain eye diseases, such as keratoconus, can cause the cornea to thin and bulge outward, worsening astigmatism. The NEI explains that keratoconus often begins in the teenage years or early adulthood and can progress over time.
Excessive or rough eye rubbing can also worsen corneal shape in people with keratoconus and even increase the risk of thinning, according to a study published in the Indian Journal of Ophthalmology. Similarly, aging can also cause changes to the lens’ shape, which may slightly shift your astigmatism prescription.
Health risks and complications
If astigmatism isn’t corrected, it can lead to progressive blurring of vision, headaches and eye strain. Dr. Allison cautions that “uncorrected astigmatism in children can lead to amblyopia, commonly known as ‘lazy eye,’ because the brain may suppress the blurred image.” The American Academy of Ophthalmology (AAO) explains that untreated refractive errors in children can interfere with normal visual development.
In adults, unmanaged astigmatism makes daily activities unsafe. Blurry vision increases the risk of car accidents or falls and makes it harder to work or read comfortably. Astigmatism doesn’t usually cause blindness, but if it’s a symptom of other conditions like keratoconus, closer monitoring and treatment may be required.
What to do about astigmatism
The best way to manage astigmatism is with regular eye exams and using the correction method that works best for you.
Glasses
Glasses are the most common treatment option for astigmatism. To correct what you’re seeing, special cylindrical lenses are designed to compensate for the uneven lens or corneal curvature. The NEI explains that prescription eyeglasses can correct refractive errors like astigmatism by helping light focus properly on the retina.
Always wear glasses as they were prescribed. Be sure to schedule regular annual vision exams to check if your prescription has changed. Avoid buying over-the-counter (OTC) reading glasses without a professional exam, since incorrect lenses can cause eye strain and worsen your vision.
Beyond just clarity, wearing the correct glasses acts as a preventative measure against chronic physical fatigue. Without them, the tiny ciliary muscles inside your eye are in a constant state of contraction, trying to find a focus that physically isn’t there because of the corneal shape. This “accommodative effort” is a leading cause of the afternoon headaches and general exhaustion often reported by those with uncorrected astigmatism. By letting the glass do the heavy lifting of refracting light, you allow those internal muscles to relax, which can significantly improve your focus and energy levels throughout a long workday.
Contact lenses
Contact lenses can also correct astigmatism. Specifically, this vision issue requires toric lenses, which are shaped to correct uneven curvature. Some people prefer contacts because they provide a wider field of vision than glasses, and for aesthetic reasons.
The AAO states that toric contact lenses are designed to correct astigmatism and are best suited for people with mild astigmatism. However, some people may need to use rigid or hard contact lenses if they have moderate to severe astigmatism.
Proper hygiene is very important. Always wash your hands before touching your lenses. Follow cleaning instructions carefully to prevent infections. Replace lenses on schedule, and never sleep in them unless your doctor says it is safe.
Orthokeratology (Ortho-K)
Orthokeratology, commonly referred to as Ortho-K, offers a fascinating non-surgical alternative for managing mild to moderate astigmatism by essentially acting as a “dental retainer” for the surface of your eye. These specialized, gas-permeable rigid lenses are designed to be worn exclusively while you sleep, applying gentle, controlled pressure to the cornea. Because the cornea is highly elastic, this overnight pressure temporarily flattens the irregular curvatures caused by astigmatism, allowing light to focus more precisely on the retina once the lenses are removed in the morning.
While the results can feel like magic, the science behind it is highly precise and requires a significant commitment to ocular health. Research published in The Journal of Ophthalmology confirms that Ortho-K is particularly effective for slowing the progression of refractive errors in younger patients, but it is not a permanent cure. Because the corneal tissue is resilient, it will naturally attempt to return to its original, irregular shape if the lenses are not worn consistently every night. This means that if you skip a few nights, your astigmatism-related blurring will gradually return as the cornea “rebounds” to its native football-like geometry.
Because these lenses sit directly on the cornea for extended periods during sleep, the margin for error regarding hygiene is incredibly slim. A trained eye care professional must meticulously map your corneal topography to ensure a perfect fit, as an ill-fitting lens can cause permanent scarring or irregular warping. Furthermore, the risk of microbial keratitis (a serious eye infection) is a real concern if the lenses are not cleaned with professional-grade solutions. Regular follow-up appointments are mandatory to monitor the health of the corneal epithelium and ensure that the reshaping process is not compromising the structural integrity of your eyes.
When to see a doctor
While gradual changes in vision are common as we age, specific “red flag” symptoms like persistent headaches, squinting to see road signs at night or a noticeable decline in the effectiveness of your current prescription should never be ignored. These are often the first signs that your astigmatism has shifted or that your eyes are overcompensating, leading to chronic muscle fatigue. More importantly, sudden occurrences such as flashes of light, a “curtain” falling over your field of vision, or acute eye pain are considered medical emergencies that require immediate evaluation to rule out serious conditions like retinal detachment or acute angle-closure glaucoma.
Beyond immediate symptoms, regular comprehensive eye exams serve as a vital preventative tool, particularly for Black communities. According to the Centers for Disease Control and Prevention (CDC), Black adults face a significantly higher risk of developing glaucoma – often at an earlier age and with more rapid progression – compared to other demographic groups.
What should you avoid if you have astigmatism?
If you have astigmatism, avoid rubbing your eyes aggressively. Frequent or hard rubbing can worsen corneal shape problems, especially if you are at risk for keratoconus. Try to manage allergies that cause itching, since itchy eyes often lead to rubbing.
Avoid skipping eye exams. Even if you think your vision is “good enough,” small prescription changes can cause eye strain. Do not wear expired contact lenses or sleep in them unless approved by your doctor. Also, poor lens hygiene increases the risk of infection, which can cause corneal scarring and worsen vision. Avoid driving at night without proper correction since astigmatism can cause glare and halos around lights, making nighttime driving dangerous.
Can surgery fix astigmatism?
Yes, surgery can correct astigmatism in many cases. Laser procedures like LASIK and PRK reshape the cornea so that light focuses properly. The NEI explains that LASIK can treat refractive errors, including astigmatism. Dr. Allison noted that PRK, LASEK, and Epi-LASIK are options that don’t create the corneal flap and are better for people with thinner corneas. However, they have longer recovery periods.
Dr. Diana Rangaves explains, “An ophthalmologist will assess candidacy by looking for a stable prescription, enough corneal thickness, and a cornea shape that can be reshaped predictably. Astigmatism does not automatically rule anyone out, but it can change which refractive surgery approach makes sense, or whether enhancement planning is needed.”
For people having cataract surgery, special toric intraocular lenses can be used at the same time to correct astigmatism. Astigmatic keratotomy is another procedure that involves making small incisions in the cornea to improve its shape. Not everyone is a good candidate for surgery. Your eyes need to be healthy and stable before you qualify, and other factors like corneal thickness, prescription stability and overall health will also determine if you’re a fit for surgery.
Bottom line
Ultimately, navigating a diagnosis of astigmatism can feel like a constant battle against blurring and visual fatigue, particularly when your prescription seems to shift from one year to the next. It is important to remember, however, that astigmatism is not an eye disease but a very common structural characteristic that affects millions of people globally. Modern optometry has advanced significantly, offering a wide array of highly customizable solutions.
By prioritizing regular, comprehensive eye exams, you are doing more than just updating a lens prescription; you are actively monitoring your internal eye health and preventing the long-term strain that can diminish your daily productivity and comfort. Taking a proactive approach allows you to move through the world with confidence, knowing that your vision is as sharp and stable as possible.
Frequently Asked Questions
What happens if astigmatism is left untreated?
If left untreated, astigmatism can cause chronic blurry vision, headaches and eye strain. In children, it can interfere with normal vision development and increase the risk of amblyopia. In adults, it may reduce safety while driving or working.
What is the best age for astigmatism surgery?
Most surgeons recommend waiting until at least age 18, when vision has stabilized and the eye shape is less likely to have dramatic changes. According to the AAO, candidates for LASIK should have a stable prescription for at least one year before surgery.
Is astigmatism considered a disability?
By itself, astigmatism usually isn’t considered a disability if it can be corrected with glasses or contacts. However, if vision remains significantly impaired even with correction, it may qualify as a visual disability under certain legal definitions.
Citations
NEI Staff. Astigmatism. National Eye Institute. https://www.nei.nih.gov/eye-health-information/eye-conditions-and-diseases/astigmatism
D. Flitcroft. Emmetropisation and the Aetiology of Refractive Errors. Eye: The Scientific Journal of The Royal College of Ophthalmologists. January 2014. https://pmc.ncbi.nlm.nih.gov/articles/PMC3930278/Nam
NEI Staff. Corneal Dystrophies. National Eye Institute. https://www.nei.nih.gov/eye-health-information/eye-conditions-and-diseases/corneal-conditions/corneal-dystrophies
Namrata Sharma, Kavita Rao, Prafulla K Maharana, Rasik B Vajpayee. Ocular Allergy and Keratoconus. Indian Journal of Ophthalmology. August 2013. https://pmc.ncbi.nlm.nih.gov/articles/PMC3775074/
Alejandra G de Alba-Campomanes MD, MPH. Amblyopia: What is Lazy Eye? American Academy of Ophthalmology. November 2025. https://www.aao.org/eye-health/diseases/amblyopia-lazy-eye
NEI Staff. Eyeglasses for Refractive Errors. National Eye Institute. https://www.nei.nih.gov/eye-health-information/eye-conditions-and-diseases/refractive-errors/eyeglasses-refractive-errors
Brenda Pagan-Duran, MD. Contact Lenses for Vision Correction. American Academy of Ophthalmology. July 2025. https://www.aao.org/eye-health/glasses-contacts/contact-lens-102
Yuan Sun, Lin Wang, Jing Gao, Mei Yang, Qi Zhao. Influence of Overnight Orthokeratology on Corneal Surface Shape and Optical Quality. Journal of Ophthalmology. October 2017. https://pmc.ncbi.nlm.nih.gov/articles/PMC5642882/
CDC Staff. About Glaucoma: Vision and Eye Health. Centers for Disease Control and Prevention. October 2024. https://www.cdc.gov/vision-health/about-eye-disorders/glaucoma.html
NEI Staff. Surgery for Refractive Errors. National Eye Institute. https://www.nei.nih.gov/eye-health-information/eye-conditions-and-diseases/refractive-errors/surgery-refractive-errors
