Yes, laser eye surgery can fix astigmatism, and the vast majority of people with the condition are suitable candidates. This is one of the most persistent myths we encounter at Laser Eye Surgery Birmingham, and it stems from the early days of laser vision correction when the technology had genuine limitations. Modern platforms, including LASIK and SMILE, are specifically designed to treat astigmatism alongside short-sightedness or long-sightedness.
Astigmatism simply means your cornea is shaped more like a rugby ball than a perfectly round football. That uneven curvature causes light entering your eye to scatter across multiple focal points rather than landing cleanly on the retina, which is why everything looks slightly blurred or smeared, both near and far.
Common Symptoms of Astigmatism?
The most obvious symptom is blurred or distorted vision at all distances, not just up close or far away. You might also notice headaches, eyestrain after reading or screen use, a tendency to squint to see more sharply, or difficulty with glare when driving at night. An optometrist can diagnose astigmatism during a routine eye exam, and the degree of astigmatism will appear in your glasses prescription as the CYL or cylinder number.
The good news is that if you have been wearing glasses or contact lenses to correct astigmatism, you are already correcting it optically. Laser eye surgery goes further by correcting the cornea itself, so that the correction becomes permanent.
How Does the Laser Correct an Irregular Cornea?
Before any laser is applied, the eye is mapped in extraordinary detail using 3D scanning technology. The scan records the precise microscopic contours of your cornea, identifying exactly where it curves too steeply or too flatly.
The laser then works to even out those irregularities, gently removing small amounts of corneal tissue to smooth the rugby ball shape back into a sphere. Once the cornea is more uniformly curved, light focuses at a single point on the retina rather than scattering, and your vision becomes sharp and clear. The whole reshaping process takes a matter of seconds per eye.
Are There Prescription Limits for Astigmatism?
Most cases of astigmatism fall comfortably within the range that laser surgery can safely treat. However, when astigmatism is severe, typically above five or six dioptres in the cylindrical component of your prescription, standard LASIK or SMILE may reach the limits of what can be safely achieved through corneal reshaping alone.
Corneal thickness is the key factor. If reshaping the tissue needed to correct a high prescription would leave the cornea too thin to remain structurally stable, the procedure will not proceed. This is why a thorough clinical assessment is not just a formality; it is the step that determines which treatment is right for your specific eye.
What if My Astigmatism is Too High for LASIK to Fully Correct?
Not being suitable for laser reshaping does not mean you are out of options. For the rare few patients whose astigmatism exceeds laser limits, the astigmatism can be almost fully corrected with the laser.
The amount of astigmatism that can be corrected depends on your corneal measurements, prescription, age, and the technical limits of the laser. That is a conversation worth having with a specialist rather than assuming the answer before you walk through the door.
Book Your Advanced Eye Assessment in Birmingham
The only way to know exactly which treatment suits your astigmatism is to have your cornea mapped. At Laser Eye Surgery Birmingham, Dr Mark Wevill uses advanced 3D diagnostic scanning to measure corneal thickness, curvature, and prescription in detail before recommending any treatment.
Whether laser surgery, ICL, or lens exchange turns out to be the right route for you, the assessment gives you a clear answer. Contact us today to book your consultation.
