Have you experienced this before?
image from: https://www.infocusoptical.com.au/what-is-astigmatism/
Astigmatism is a common vision condition where the cornea (the clear front surface of the eye) or the lens inside the eye has an irregular shape, causing light to refract unevenly. Normally, a perfectly shaped cornea or lens is spherical, like a basketball. However, in astigmatism, the cornea or lens is shaped more like a football or an egg, which results in blurred or distorted vision at any distance.
Symptoms of Astigmatism
People with astigmatism may experience:
- Blurred or distorted vision at all distances (near and far)
- Eye strain or discomfort, especially after reading or prolonged screen use
- Headaches, often due to squinting or focusing effort
- Difficulty seeing clearly at night, particularly while driving
- Frequent squinting in an attempt to improve focus
- Double vision in one eye (in severe cases)
Causes of Astigmatism
Astigmatism occurs due to irregular curvature of the cornea or lens. Several factors may contribute to its development:
- Genetics: Astigmatism often runs in families and is typically present from birth.
- Eye injuries or surgeries: Trauma or surgical procedures can alter the cornea's shape, leading to astigmatism.
- Keratoconus: This rare condition causes the cornea to thin and become cone-shaped, resulting in severe astigmatism.
- Natural aging process: Over time, the shape of the eye's cornea can change, potentially leading to astigmatism.
Diagnosis and Treatment
Astigmatism is diagnosed through a comprehensive eye examination, which may include tests like:
- Visual acuity test (reading an eye chart)
- Keratometry (measuring the curvature of the cornea)
- Refraction tests (to determine the eye’s ability to focus light)
Treatment options include (non-invasive methods):
- Prescription eyeglasses or contact lenses to correct the uneven curvature
- Toric lenses (specialized contact lenses designed to address astigmatism)
Regular eye exams are essential for early detection and effective management of astigmatism to prevent worsening vision.
Astigmatism is an eye condition where the cornea or lens is irregularly shaped, causing blurred vision.
Symptoms: Blurred vision, eye strain, headaches, and difficulty seeing at night.
Causes: Genetic factors, eye injuries, keratoconus, or aging.
Treatment: Corrective glasses, contact lenses. Regular eye exams are key for management.