Is SMILE Surgery Possible for High Astigmatism?

Is SMILE Surgery Possible for High Astigmatism?

SMILE has built-in correction limits: up to -10.00 diopters for myopia and up to -5.00 diopters for astigmatism. While many people believe their astigmatism is very high, it’s usually within this correctable range.

For astigmatism over -5.00 diopters, partial correction may be done, leaving a small amount of residual astigmatism. In most cases, mild residual astigmatism doesn’t cause noticeable symptoms and doesn’t impact daily life.

Is SMILE Surgery Not Possible If I Have Thin Corneas?

LASIK is comfortable, but it removes more corneal tissue than any other laser correction surgeries. That’s why in the past, people with thin corneas often opted for LASEK, even though it’s more uncomfortable during recovery.

SMILE, however, offers the comfort of LASIK while preserving corneal tissue like LASEK. So now, even people with relatively thin corneas can often undergo SMILE.

If I’ve Worn Contact Lenses For a Long Time, Does That Make Me Ineligible for SMILE?

Wearing contacts for a long time doesn’t make the cornea thinner. However, it can cause inflammation, dryness, and oxygen deficiency, which may distort the corneal shape and lead to irregular astigmatism, potentially affecting the surgical outcome.

In such cases, it’s best to stop wearing contact lenses for at least 1–2 months. During that time, you may need anti-inflammatory eye drops and multiple checkups every 2–3 weeks. Once your cornea returns to its normal condition, then a proper exam can be done and surgery can be safely scheduled.

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