Astigmatism, a common refractive error affecting the eye's shape, can sometimes seem to worsen over time. It's crucial to understand that astigmatism itself doesn't necessarily get worse in the way a disease might progress. Instead, the perceived worsening often stems from other factors influencing how the eye focuses light. Let's delve into the key reasons behind this change:
Is Astigmatism a Progressive Condition?
While astigmatism is typically present from birth or develops early in childhood, it's generally considered stable in adulthood. However, changes in the eye's shape or focusing power can appear as worsening astigmatism. This is not necessarily a progressive worsening of the astigmatism itself, but rather a shift in how your eye functions.
What Factors Can Make Astigmatism Seem Worse?
Several factors can contribute to the impression that your astigmatism is worsening:
1. Age-Related Changes:
Eye Shape and Lens Changes: As we age, the shape of the eye and the elasticity of the eye's lens can change. These changes can subtly alter the way light is focused, leading to a perceived increase in astigmatism. This is particularly noticeable during presbyopia (age-related near vision loss), where the lens's ability to accommodate (change shape for focusing) diminishes.
2. Underlying Eye Conditions:
Keratoconus: This condition involves a gradual thinning and bulging of the cornea, leading to a significant increase in astigmatism. This is a progressive condition, unlike the typical stable astigmatism.
Other Corneal Conditions: Various corneal diseases or injuries can alter the cornea's shape, causing changes in astigmatism.
3. Eye Strain and Fatigue:
Prolonged Near Work: Extended periods of near-work activities, such as reading or computer use, can cause eye strain and temporary focusing difficulties. This can lead to a feeling that your astigmatism has worsened, even if it hasn't.
Lack of Sleep: Insufficient sleep can exacerbate eye strain and contribute to temporary blurry vision, mimicking worsening astigmatism.
4. Incorrect or Outdated Prescription:
Changes in Refractive Error: A prescription that's outdated or doesn't fully correct your refractive error (including astigmatism) can lead to symptoms that feel like worsening astigmatism. Regular eye exams are crucial to ensure your prescription remains accurate.
Does Astigmatism Always Get Worse Over Time?
No, astigmatism doesn't always worsen over time. For most people, astigmatism remains relatively stable throughout adulthood. The perceived worsening is often due to age-related changes, eye strain, or other contributing factors.
When Should I See an Eye Doctor?
If you experience a sudden change in your vision, blurred vision, eye pain, or if you suspect a worsening of your astigmatism, schedule an appointment with your ophthalmologist or optometrist immediately. They can perform a thorough eye exam to determine the cause of the change and provide appropriate treatment. Regular eye exams are crucial for monitoring your eye health and ensuring your prescription remains accurate.
How is Astigmatism Corrected?
Astigmatism is usually corrected with eyeglasses, contact lenses, or refractive surgery (like LASIK). Your eye care professional will help determine the best correction method based on your individual needs and circumstances.
This information is for general knowledge and doesn't substitute professional medical advice. Always consult your eye doctor for diagnosis and treatment of any eye condition.
