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Astigmatism is often diagnosed in childhood and assumed to be stable once the prescription is established. But many people find their vision changing years later and start asking: can astigmatism get worse? The answer is yes, under certain conditions, and understanding when and why it changes helps you stay ahead of prescription drift rather than reacting to it.
The optometrists at OPTYX NEW YORK see astigmatism changes across all age groups. Here is what drives those changes and how to tell whether your prescription needs updating.
Can Astigmatism Get Worse During Childhood and Adolescence?
Astigmatism frequently shifts during childhood and adolescent eye development. The cornea continues to develop through the teens, and both the degree and axis of astigmatism can change during this period. Can astigmatism get worse during growth spurts? Yes. Refractive shifts, including changes in astigmatism, are common in children aged 8 to 14 and typically stabilize in the late teens or early twenties.
This is why annual eye exams are particularly important during childhood. A prescription that was accurate at age ten may be noticeably underpowered by age thirteen.
Can Astigmatism Get Worse With Age in Adults?
Can astigmatism get worse with age after the prescription stabilizes in early adulthood? Yes, though the mechanism is different from childhood changes. Adult-onset astigmatism changes are typically slower and driven by gradual shifts in corneal curvature, crystalline lens changes, or both.
Can astigmatism get worse with age during your 40s and 50s? This age range sees the most common adult-onset change, often because the crystalline lens becomes less flexible as presbyopia develops. The same lens stiffening that makes close reading harder also affects how astigmatism is expressed optically. Many people in this age group find that their astigmatism correction needs updating alongside their reading addition.
Can Astigmatism Get Worse Over Time Due to Eye Conditions?
Can astigmatism get worse over time due to an underlying eye condition? Yes. Keratoconus, a condition in which the cornea progressively thins and steepens into a cone shape, causes astigmatism that worsens more rapidly than age-related changes. It typically first appears in the late teens or early twenties and can progress through the thirties.
Keratoconus-related astigmatism is irregular, meaning glasses and standard soft contact lenses do not correct it fully. If your astigmatism is progressing faster than expected or your corrected vision is declining despite updated glasses, corneal topography can determine whether keratoconus is the cause.
Eyelid changes from conditions like ptosis or chalazia can also temporarily distort the corneal surface and increase measured astigmatism. In these cases, can astigmatism get worse over time is answered differently: the underlying lid condition is driving the change, not the cornea itself.
Can Astigmatism Get Worse Suddenly?
Can astigmatism get worse suddenly rather than gradually? Sudden worsening is less common than gradual progression and warrants prompt evaluation. A rapid change in astigmatism can indicate corneal thinning consistent with keratoconus, a corneal injury, or rapid progression of an existing condition.
If your vision becomes significantly blurrier over days or weeks, or if corrective lenses that worked well recently no longer provide clear vision, schedule an eye exam rather than waiting for your routine appointment. Sudden changes are more diagnostically significant than slow drift.
Can Your Astigmatism Get Worse After LASIK?
Can your astigmatism get worse after LASIK surgery? In some cases, regression occurs after laser correction, where the cornea partially reverts toward its pre-surgical shape over months or years. Most LASIK procedures include a buffer for mild regression in the prescription planning, and the enhancement rate for residual astigmatism is low.
More rarely, post-LASIK ectasia develops when the cornea was too thin to begin with, producing progressive irregular astigmatism. Pre-surgical screening is designed to identify patients at risk for ectasia before the procedure.
What Triggers Astigmatism Changes in Adults?
Not all astigmatism changes are driven by age alone. Several factors contribute to prescription shifts in adult patients.
- Pregnancy: hormonal changes affect corneal curvature and hydration, sometimes shifting astigmatism temporarily during and shortly after pregnancy.
- Uncontrolled diabetes: blood sugar fluctuations affect lens shape and can change astigmatism and sphere correction alongside each other.
- Habitual eye rubbing: chronic rubbing can thin and steepen the cornea over years, increasing astigmatism.
- Contact lens wear: long-term wear of poorly fitting contact lenses can mold the corneal shape, temporarily shifting astigmatism measurement.
How Often Should You Update Your Prescription?
If you are asking can astigmatism get worse between appointments, the answer is yes, which is why annual eye exams are the standard recommendation even when your vision feels stable.
For adults with a history of changing prescriptions, or for anyone over 40 where presbyopia is beginning to interact with the astigmatism correction, a yearly check catches shifts before they start affecting day-to-day clarity. Children and teenagers should be examined annually because their prescriptions can change more quickly.
Book an Eye Exam at OPTYX NEW YORK
Prescription drift often develops gradually enough that people accommodate to it before noticing. If your vision does not feel as sharp as it used to, or if your current glasses feel less effective than when they were new, your astigmatism may have shifted.
OPTYX NEW YORK has 14 locations across Manhattan, Long Island, the North Fork, the Hamptons, and Westchester. Book an eye exam and get an accurate measurement of whether and how your astigmatism has changed.
