Comparing Rotational Stability of Clareon and Eyhance Toric IOLs in a Real-World Setting

Area of Science:

• Ophthalmology
• Biomedical Engineering
• Medical Device Technology

Background:

• The Eyhance Toric intraocular lens (IOL) is an updated version of the Tecnis Toric platform, designed to address previous concerns regarding post-operative rotational instability.
• This study compares the rotational stability of the modified Eyhance Toric IOL against the Clareon Toric IOL, a device known for its stable performance.

Purpose of the Study:

• To evaluate and compare the post-operative rotational stability of the Eyhance Toric IOL versus the Clareon Toric IOL.
• To assess visual acuity and refractive astigmatism outcomes in patients implanted with either IOL.

Main Methods:

• 187 patients undergoing cataract surgery were implanted with either the Eyhance Toric or Clareon Toric IOL.
• Intraocular lens (IOL) stability, uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), and refractive astigmatism were measured at specific post-operative intervals.
• Rotational measurements were taken using the Barrett Toric Calculator at baseline, 6-24 hours, and 3 weeks to 6 months post-surgery.

Main Results:

• No significant differences in UDVA, CDVA, or refractive astigmatism were observed between the two IOL groups at 6 months.
• Median IOL rotation from baseline to 6 months was not statistically different between the Eyhance Toric and Clareon Toric IOLs.
• While the Clareon IOL showed less rotation between 24 hours and 6 months, overall absolute rotation measurements were comparable across both IOLs.

Conclusions:

• The Eyhance Toric IOL demonstrates comparable post-operative rotational stability and visual outcomes to the Clareon Toric IOL.
• Design modifications have successfully enhanced the rotational stability of the Eyhance Toric IOL.
• The Eyhance Toric IOL is a viable clinical option for cataract surgery patients requiring astigmatism correction.