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Rotation Characteristics of Three Toric Monofocal Intraocular Lenses.

Brent A Kramer1, David R Hardten2, John P Berdahl3

  • 1Department of Ophthalmology, University of North Carolina, Chapel Hill, NC, USA.

Clinical Ophthalmology (Auckland, N.Z.)
|December 28, 2020
PubMed
Summary
This summary is machine-generated.

The AcrySof IQ Toric intraocular lens (IOL) demonstrated superior rotational stability compared to TECNIS and enVista Toric IOLs. This finding is crucial for optimizing astigmatism correction after cataract surgery.

Keywords:
AcrySofTECNISastigmatismenVistarotation

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Area of Science:

  • Ophthalmology
  • Biomedical Engineering
  • Optics

Background:

  • Toric intraocular lenses (IOLs) are designed to correct astigmatism during cataract surgery.
  • Rotational stability of toric IOLs is critical for maintaining effective astigmatism correction postoperatively.
  • Variations in rotational stability among different toric IOL models can impact refractive outcomes.

Purpose of the Study:

  • To evaluate and compare the rotational stability of three commonly used monofocal toric intraocular lenses (IOLs).
  • To analyze rotational data using an online toric IOL back-calculator to assess real-world performance.
  • To identify factors influencing toric IOL rotation, such as IOL model and initial placement axis.

Main Methods:

  • Retrospective analysis of data from an online toric IOL back-calculator.
  • Inclusion of data with preoperative planning, postoperative orientation, and refractive error (≥0.5D residual astigmatism).
  • Calculation of IOL rotation based on pre-operative intended and post-operative actual IOL orientation.

Main Results:

  • A total of 3238 eyes with three monofocal toric IOLs were analyzed.
  • Rotational rates varied: AcrySof (72.7%), TECNIS (83.4%), and enVista (83.0%).
  • All IOL models showed a tendency for counterclockwise rotation, particularly when initially placed horizontally or obliquely.

Conclusions:

  • The AcrySof IQ Toric IOL exhibited significantly greater rotational stability compared to TECNIS and enVista Toric IOLs.
  • No significant difference in rotational stability was found between the TECNIS and enVista Toric IOLs.
  • These findings have implications for toric IOL selection to achieve optimal and stable astigmatism correction.