LASIK for Astigmatism: Results & Limits

Astigmatism is not “too complicated” for LASIK—within limits. The key is accurate mapping and the right treatment plan.

What is astigmatism?

Instead of being perfectly round, the cornea can be shaped more like a football, causing light to focus at different points. LASIK reshapes the cornea to create a more uniform curve and sharper focus.

Candidacy factors

• Cylinder power within the clinic’s safe treatment range
• Regular (not irregular) astigmatism on topography/tomography
• Adequate corneal thickness and healthy ocular surface

What to expect

• Many patients achieve sharp distance vision after LASIK with astigmatism correction.
• Night glare/halos can be more noticeable early on with higher cylinders; they usually fade over weeks to months.
• Dryness management helps stabilize quality and comfort.

When LASIK may not be ideal

• Irregular astigmatism or early keratoconus patterns
• Very high cylinder values beyond safe ablation profiles
• Thin corneas where tissue preservation is a priority

In these cases, PRK, ICL, or other strategies may be safer.

Good questions for your surgeon

• Are my maps consistent and regular?
• What is my cylinder power and how does it affect outcomes?
• Which guidance approach (wavefront vs topography) fits my eye best?

Bottom line: With careful screening and planning, LASIK can successfully treat many astigmatism profiles. Let your measurements steer the choice.