Astigmatism is one of the most common vision conditions in Australia, affecting a large proportion of the population to some degree. Yet many people leave an eye test confused about what it actually means. Here is a clear explanation, and what can be done about it.
What Is Astigmatism?
A normal eye is roughly spherical, like a basketball. In astigmatism, the eye (or the cornea) is shaped more like a rugby ball — with different curvatures in different directions. This means light entering the eye focuses at multiple points rather than a single sharp point on the retina, causing blurred or distorted vision at all distances.
Astigmatism is usually present alongside myopia (short-sightedness) or hyperopia (long-sightedness), which is why you'll often see a “CYL” (cylinder) and “AXIS” value alongside the “SPH” on your prescription.
Symptoms of Astigmatism
- Blurred or distorted vision at both near and far distances
- Difficulty seeing fine detail clearly
- Eye strain and headaches, particularly after reading or screen use
- Squinting to see more clearly
- Glare or halos around lights at night
- Difficulty driving at night
How Is Astigmatism Corrected?
The good news is that astigmatism is very well managed with the right prescription. Options include:
- Spectacles — toric lenses in glasses correct astigmatism effectively for most people. Thin-index lenses (available in our eyewear range) are worth considering for higher prescriptions.
- Toric soft contact lenses — specifically designed for astigmatism, with a weighted design to keep them orientated correctly on the eye. Available in daily and monthly disposable options. Read our full guide to toric contact lenses.
- Rigid gas permeable or scleral lenses — for higher or irregular astigmatism, rigid lenses can provide sharper vision than soft lenses.
Is Astigmatism Progressive?
Mild astigmatism is typically stable throughout adulthood. However, astigmatism that is rapidly increasing in a young person should prompt investigation for keratoconus, a condition where the cornea progressively thins and bulges.
A comprehensive eye test at Prime Optometrists Auburn includes keratometry and corneal assessment, which can distinguish simple astigmatism from early corneal disease. Bulk billed under Medicare for eligible patients. Book online or call (02) 9761 0005.