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Laser-assisted marking for toric intraocular lens alignment.

H Burkhard Dick1, Tim Schultz1

  • 1From Ruhr University Eye Hospital, Bochum, Germany.

Journal of Cataract and Refractive Surgery
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Summary

This study introduces a safe laser-assisted corneal marking technique using 3D OCT for precise toric intraocular lens alignment. The method creates clear intrastromal incisions, aiding accurate axis marking in cataract surgery.

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Area of Science:

  • Ophthalmology
  • Surgical Technology
  • Corneal Surgery

Background:

  • Toric intraocular lens (IOL) implantation requires precise alignment for optimal astigmatism correction.
  • Current methods for corneal marking may have limitations in accuracy and reproducibility.

Purpose of the Study:

  • To describe and evaluate a novel 3-dimensional spectral-domain optical coherence tomography (3D-SD-OCT) controlled laser-assisted corneal marking technique.
  • To assess the safety and efficacy of this technique for toric IOL implantation.

Main Methods:

  • A case series of 10 eyes undergoing toric IOL implantation.
  • Utilized an image-guided femtosecond laser to create two perpendicular intrastromal corneal incisions (0.75 mm width) for axis marking.
  • 3D-SD-OCT was employed for real-time guidance and control during the laser marking procedure.

Main Results:

  • The laser-assisted corneal marking procedure was performed successfully in all cases.
  • No posterior corneal perforations or epithelial alterations were observed.
  • Incisions were clearly visible under microscopy, and no adverse optical phenomena were reported at 6 weeks post-surgery.

Conclusions:

  • Laser-assisted corneal marking guided by 3D-SD-OCT is a safe and effective technique.
  • This method offers the potential for precise and reproducible axis marking, improving toric IOL alignment accuracy.
  • Further studies are warranted to confirm long-term outcomes and broader clinical applicability.