Cataract & Refractive Lens Surgery

Astigmatism Correction During Cataract Surgery

Corneal astigmatism can be addressed during cataract surgery with toric lens implants or relaxing techniques, planned from precise corneal measurements.

Two members of the surgical team at work in the operating room, one wearing surgical loupes

What the procedure addresses

This service addresses corneal astigmatism at the time of cataract surgery. Without correction, astigmatism persists after the operation and continues to blur vision at all distances, often leaving patients reliant on glasses even with a clear lens.

Who may be a good candidate

Candidates have measurable corneal astigmatism and an interest in reducing glasses dependence after cataract surgery. The amount and regularity of the astigmatism, along with eye health, determine whether a toric lens or another approach suits you.

What the procedure involves

Preoperative corneal measurements map the shape and cylinder of your cornea. A toric lens is selected with power matched to those measurements and aligned to a specific axis during surgery. Accurate alignment is essential to the correction working as planned.

Specialist perspective

Astigmatism correction is measurement-driven. Small errors in alignment or healing drift reduce the benefit, which is why the specialist assessment, marking technique, and follow-up all matter. Expectations about residual cylinder are set honestly before surgery.

Outcomes

Most patients experience a significant reduction in astigmatism and improved uncorrected distance vision. Some residual astigmatism can remain, and glasses may still be useful for certain tasks or lighting conditions.

Recovery and timeline

Recovery follows the standard cataract surgery course. Toric lens alignment is checked at follow-up visits, since early postoperative rubbing or rotation can affect the correction and occasionally requires repositioning.

Risks and limitations

Risks include those of cataract surgery generally, plus toric-specific considerations such as lens rotation, residual astigmatism, and measurement unpredictability in certain corneas. These are reviewed with you before surgery.

FAQ

Frequently asked questions

What is astigmatism?

Astigmatism is a common condition where the cornea is shaped more like a football than a sphere, causing light to focus unevenly. It blurs vision at all distances and is corrected with cylindrical power in glasses.

Can astigmatism be corrected during cataract surgery?

Yes. Corneal astigmatism can be addressed with a toric lens implant designed to neutralize corneal cylinder, or with corneal relaxing techniques, planned from precise preoperative measurements.

What is a toric lens?

A toric lens is an implant with built-in cylindrical correction. It is aligned to a specific axis in your eye during surgery so that its correction matches your corneal shape.

How accurate is astigmatism correction?

Outcomes depend on measurement quality, lens alignment, and individual healing. Most patients experience a meaningful reduction in astigmatism, though some residual cylinder can remain and may still benefit from glasses.

Is astigmatism correction covered by insurance?

Correction of astigmatism at the time of cataract surgery is generally considered an upgrade beyond standard provincial coverage. Specific costs and coverage are confirmed at consultation.

Patient Education

Considering Astigmatism Correction?

Begin with an assessment. Your surgeon will explain your options, including when surgery is not the right step.

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