Clearing Up Common Questions About Astigmatism
If you’ve ever been told you have astigmatism, you’re certainly not alone. It’s one of the most common refractive errors we discuss with patients at Eye Philosophy Optometrists in our Williamstown and Doncaster clinics. Yet, despite its prevalence, it often comes wrapped in a cloud of misconceptions. Many people hear the term and aren’t quite sure what it means for their vision, their eye health, or their options for correction.
At its core, astigmatism is simply a difference in the way your eye focuses light. Unlike the common perception, it’s not an eye disease; it’s a variation in the shape of your eye’s front surface (the cornea) or the lens inside the eye. Think of it like the difference between a perfectly round basketball and a slightly elongated rugby ball. This shape means light can bend unevenly, leading to vision that may be blurred or distorted at various distances.
Let’s move beyond the jargon and address some of the frequent questions and curiosities we encounter in our Melbourne practice.
Beyond Simple Blur: What Does Vision with Astigmatism Actually Feel Like?
While blurry vision is a common symptom, astigmatism can present in subtler ways. Patients often describe a general lack of sharpness or clarity, where both near and distant objects appear slightly soft or smeared. It’s not always the uniform blur associated with short-sightedness (myopia) or long-sightedness (hyperopia).
You might notice specific visual disturbances, especially in low-light conditions or when looking at high-contrast objects. For instance, lights at night may have noticeable glare, streaks, or haloes around them. Text on a screen or page might seem to have a faint shadow or ghosting effect. Some people report experiencing eye strain, headaches, or fatigue after prolonged visual tasks like driving, reading, or using a computer, as their eyes work harder to try to achieve a clear focus.
It’s important to remember that these experiences can vary widely. Some individuals have a very mild degree of astigmatism that their visual system compensates for with little issue, while others with a different type or degree may find it significantly impacts daily life. This variability is precisely why a comprehensive eye examination is so crucial—it allows our optometrists to measure not just the presence of astigmatism, but its exact characteristics and how it interacts with your unique visual demands.
Unravelling the Myths: Separating Fact from Fiction
A good place to start is by clearing the air on a few persistent myths.
Myth 1: “Astigmatism is caused by reading in dim light or sitting too close to the TV.”
This is a long-held belief with no substantive evidence. Astigmatism is primarily related to the natural, inherited shape of your eye. While certain eye injuries, surgeries, or conditions like keratoconus can induce or change astigmatism, everyday activities like screen use are not causative factors. They may, however, exacerbate symptoms of eye strain if vision is uncorrected.
Myth 2: “Astigmatism gets progressively worse much faster than other vision problems.”
Astigmatism is typically quite stable throughout adulthood. Much like the general prescription for myopia or hyperopia, it can change gradually over time, but there’s no clinical basis to suggest it deteriorates at an accelerated rate. Significant or sudden changes in astigmatism warrant a professional assessment to rule out other underlying conditions.
Myth 3: “You can’t wear contact lenses if you have astigmatism.”
This was a limitation of older contact lens technology, but it is absolutely not the case today. Modern contact lenses, specifically toric lenses, are expertly designed to correct astigmatism. They have features that allow them to maintain the correct orientation on the eye to provide clear, stable vision. For some patients, especially those seeking an alternative to daytime lenses, Ortho-K (orthokeratology) can also be a considered option. These specially designed rigid lenses, worn overnight, gently reshape the cornea to temporarily correct refractive errors, including astigmatism, providing clear vision during the day without lenses. It’s important to discuss with your optometrist whether you are a suitable candidate for this type of management.
The Cornerstone of Clarity: How is Astigmatism Diagnosed and Measured?
Diagnosing astigmatism is a fundamental part of any thorough eye check. At Eye Philosophy Optometrists, we don’t just determine if you have it; we map its precise contours. During your exam, you’ll likely encounter a few key tests:
Autorefraction & Retinoscopy: These initial tests give our optometrists an objective starting point for your prescription, including any astigmatic component.
Subjective Refraction: This is the “which is better, one or two?” part of the test. It refines the prescription to your personal response, ensuring the correction feels right for your brain and eyes.
Keratometry/Corneal Topography: This is where we get a detailed map of your cornea’s surface curvature. It’s invaluable for distinguishing between different types of astigmatism (corneal vs. lenticular) and is essential for fitting certain contact lenses or assessing suitability for procedures like Ortho-K.
This combination of tests provides a complete picture. It allows us to differentiate between regular astigmatism (where the curvature is even but not spherical) and irregular astigmatism (often due to corneal scarring or conditions like keratoconus), which requires a different management approach.
Living with Astigmatism: Your Options for Clearer Vision
The good news is that astigmatism is highly manageable for the vast majority of people. The goal is to compensate for the uneven curvature of your eye, allowing light to focus properly on the retina.
Eyewear: More Than Just a Prescription
Prescription glasses are the simplest and most common method of correction. Lenses for astigmatism (called toric or cylindrical lenses) have different powers in different meridians of the lens to counteract the eye’s asymmetry. Modern lens designs and materials mean these lenses can be thin, lightweight, and provide excellent optics. Our opticians at our Williamstown and Doncaster practices can help you choose frames and advanced lens options, like anti-reflective coatings, that further enhance visual comfort, especially for that nighttime glare.
Contact Lenses: A Broader World of Choice
As mentioned, toric soft contact lenses are a popular and effective daily-wear option. For more complex prescriptions or higher degrees of astigmatism, rigid gas permeable (RGP) lenses can often provide exceptionally sharp vision as they create a new, smooth refractive surface over the cornea. For those interested in myopia management or freedom from daytime lenses, Ortho-K presents a unique non-surgical option. It’s a specialised fitting process that requires careful assessment, expert fitting, and ongoing monitoring by an optometrist experienced in the field.
A Note on Surgical Options:
While Eye Philosophy Optometrists focuses on non-surgical management, we often discuss surgical referrals with interested patients. Procedures like LASIK or PRK can reshape the cornea to correct astigmatism. It’s critical to have a realistic understanding that all procedures carry inherent risks and benefits, and a thorough pre-operative assessment is essential to determine suitability. We encourage any patient considering this path to seek comprehensive consultations with qualified refractive surgeons.
Astigmatism Through the Lifespan: From Children to Older Adults
In Children:
Astigmatism in children is not uncommon. If significant and uncorrected, it can sometimes contribute to a lazy eye (amblyopia), as the developing visual brain may not learn to see clearly. This is a key reason why the Australian College of Optometrists recommends children have a full eye examination before starting school. Early detection means our optometrists can manage it appropriately, often with prescription glasses, to support healthy visual development.
In Adults:
For most adults, astigmatism remains stable. However, subtle shifts can occur naturally with age. A more notable change can be the development of lenticular astigmatism as the eye’s internal lens changes, sometimes in the early stages of cataract formation. Any persistent change in your vision should prompt a comprehensive eye examination to determine the cause.
Your Questions, Answered Informally
“Can exercises fix my astigmatism?”
There is no reliable scientific evidence that eye exercises can alter the fundamental shape of your cornea or lens to correct astigmatism. Exercises may help with focusing stamina or eye coordination issues, but they do not address the refractive error itself.
“Will wearing the wrong prescription make my astigmatism worse?”
Wearing an incorrect prescription won’t change the physical structure of your eye. However, it can lead to unpleasant symptoms like headaches, eye strain, and dizziness. It’s always best to have vision corrected accurately for comfort and performance.
“Is astigmatism linked to other eye diseases?”
Regular astigmatism itself is not a disease. However, certain eye conditions, such as keratoconus or pterygium, can cause or exacerbate astigmatism. This is another reason why regular check-ups are about more than just getting a new glasses script—they are a vital part of monitoring your overall eye health.
Taking the Next Step Towards Clearer Vision
Understanding astigmatism is the first step toward managing it effectively. If the descriptions of blurred vision, glare, or eye strain resonate with you, or if it’s simply been a while since your last check-up, the team at Eye Philosophy Optometrists is here to help.
Our approach in Williamstown and Doncaster is always patient-centred. We take the time to explain our findings, discuss all suitable management options—from prescription glasses and contact lenses to discussing Ortho-K for suitable candidates—and provide evidence-informed advice tailored to your lifestyle and visual needs.
We believe in clear sight and clear communication. Don’t put up with less-than-sharp vision as just “how things are.” A comprehensive eye examination can provide answers and a clear path forward.
Disclaimer: This blog provides general information about astigmatism. It is not intended as personal medical advice. For a diagnosis and management plan tailored to your individual circumstances, please book an appointment with one of our optometrists. All treatments and management options carry potential risks and benefits; suitability varies per individual.