Quick Answer
Yes. EVO ICL corrects astigmatism up to -4.00D using a toric lens variant called the Toric EVO ICL (also referred to as EVO+ Toric ICL). The lens incorporates cylinder correction into its optic, eliminating astigmatism and myopia simultaneously in a single procedure. Astigmatism correction with Toric EVO ICL is included in the FDA-approved indication for the device.
Detailed Explanation
Astigmatism is a refractive condition caused by an irregular curvature of the cornea or natural lens, producing distorted or blurred vision at all distances. It affects approximately one-third of the global population to some degree and frequently co-exists with myopia.
For most patients seeking EVO ICL, astigmatism is not a separate problem requiring a separate procedure — it is corrected as part of the standard EVO ICL implantation using the appropriate toric lens design.
How Toric EVO ICL corrects astigmatism:
A toric lens incorporates two different optical powers in different meridians — the principal meridian that requires spherical correction (myopia correction) and the perpendicular meridian that requires cylindrical correction (astigmatism correction). The Toric EVO ICL is precisely manufactured to match the patient’s specific sphere and cylinder prescription.
For the toric correction to be effective, the lens must be oriented precisely along the correct axis of astigmatism. This is achieved through:
1. Preoperative axis marking: Before surgery, the surgeon marks the patient’s eye at the appropriate axis position while the patient is sitting upright (not lying down, as the eye can cyclotort — rotate slightly — when supine). This ensures accurate orientation. 2. Lens rotation during implantation: After the lens is placed, the surgeon rotates it to align with the marked axis. 3. Anatomical retention: The posterior chamber’s anatomical geometry stabilizes the lens in its correct orientation over time.
If the toric lens rotates out of axis post-operatively, its astigmatism correction becomes misaligned and may actually induce astigmatism rather than correct it. For this reason, lens stability and accurate initial placement are critical.
The range of astigmatism EVO ICL can correct:
The FDA-approved Toric EVO ICL corrects:
- Myopia: -3.00D to -20.00D
- Cylinder (astigmatism): -1.00D to -4.00D
For patients with astigmatism below -1.00D, the standard spherical EVO ICL (without toric correction) is typically implanted. Small amounts of astigmatism often do not require dedicated correction, as the spherical lens achieves adequate visual quality without it.
For astigmatism above -4.00D, supplemental laser treatment (PRK or LASIK) applied after EVO ICL implantation can address the residual cylinder. This is part of the “bioptics” approach — combining EVO ICL for the bulk of the correction with laser for fine-tuning.
For surgeons recognized for excellence in toric EVO ICL outcomes, see the EVO ICL Awards page.
Toric EVO ICL versus laser astigmatism correction:
Both LASIK and PRK correct astigmatism through corneal reshaping. For patients who qualify for laser surgery, LASIK or PRK effectively treats astigmatism up to approximately -4D to -5D in well-selected cases. EVO ICL’s toric design addresses the same range through an implant-based approach rather than corneal modification.
For patients with high myopia and significant astigmatism who have been disqualified from laser surgery, Toric EVO ICL is often the only procedure that can address both components simultaneously without corneal tissue concerns.
Accuracy of toric correction:
In clinical studies of Toric ICL, the accuracy of astigmatism correction is high. Published data shows that the majority of patients achieve uncorrected distance visual acuity within one line of their best corrected preoperative acuity, indicating that the toric correction performed as intended.
Lens rotation — the primary risk factor for reduced toric accuracy — occurs in a small percentage of cases. Published studies report clinically significant rotation (greater than 10 degrees off axis) requiring lens repositioning in approximately 1 to 2% of toric ICL cases. This rate compares favorably with other toric intraocular lens designs.
Important Considerations
Preoperative axis marking is one of the most technically important steps in Toric EVO ICL surgery, and it is one where human error can meaningfully affect the result. The gold standard is marking performed by the operating surgeon with the patient seated upright at the slit lamp using a surgical marker or digital alignment system. Practices using digital axis marking systems (such as the VERION Image Guided System or Callisto eye) that overlay the axis reference onto the surgical microscope view achieve higher axis accuracy than manual marking alone.
Ask your surgeon what method they use for axis marking. The answer tells you something important about the precision of their toric EVO ICL workflow.
Patients with irregular astigmatism — astigmatism that is not cleanly defined on corneal topography, or that is caused by irregular corneal surface disease — are not good candidates for toric EVO ICL. Toric correction assumes a regular, stable astigmatic axis. Irregular astigmatism requires different evaluation and may not be fully correctable with any refractive procedure.
What to Do Next
At your EVO ICL consultation, bring your most current glasses or contact lens prescription. Ensure the prescription includes your cylinder power and axis. Ask the surgeon to explain whether your astigmatism falls within the Toric EVO ICL correction range or whether supplemental laser treatment may be needed to address it fully.
Review What Is EVO ICL Surgery? for a complete overview of the procedure itself, including how the implantation works for toric and spherical designs.
Related Questions
I have dry eyes — does that affect astigmatism correction? Dry eye is not a contraindication for Toric EVO ICL. See Can I Get EVO ICL If I Have Dry Eyes? for how EVO ICL handles pre-existing dry eye.
Does EVO ICL work well for nearsightedness generally? Read EVO ICL for Nearsightedness: How Well Does It Work? for the complete myopia correction performance data.
What if my astigmatism is not fully corrected after surgery? See What Happens If My Vision Changes After EVO ICL? for options when residual refractive error remains after the initial procedure.