Astigmatism — an irregularly shaped cornea causing blurred or distorted vision at all distances — has historically been more limited in how much correction was safely achievable through refractive surgery. Current technology has meaningfully expanded that range.
What's changed
Current-generation platforms like the Visumax 800 (see our technology explainer) offer more precise correction capability, including for higher degrees of astigmatism that older laser technology couldn't safely or effectively address.
If you were told in the past that your astigmatism was too significant for refractive surgery, it's genuinely worth a fresh evaluation with current-generation technology before assuming that conclusion still holds.
How astigmatism correction actually works
Rather than treating the cornea uniformly, the laser reshapes it asymmetrically, flattening the steeper axis of the astigmatism to create a more evenly curved, spherical surface — precision in this asymmetric shaping is exactly where technology improvements have mattered most.
Combined astigmatism and myopia/hyperopia correction
Most patients with astigmatism also have some degree of nearsightedness or farsightedness, and current technology addresses both simultaneously in a single procedure — this isn't treated as two separate corrections requiring separate visits.
What to confirm in your evaluation
Ask specifically what degree of astigmatism correction your evaluating surgeon has experience with on their specific technology platform — this is directly relevant to your candidacy and expected outcome, not a generic question.
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