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Related Experiment Videos

Simple steep-axis marking technique using a corneal analyzer.

Alex L K Ng1, Tommy C Y Chan1, Vishal Jhanji1

  • 1From the Department of Ophthalmology (Ng), University of Hong Kong, and the Hong Kong Eye Hospital (Chan), Kowloon, the Department of Ophthalmology and Visual Sciences (Chan, Jhanji), Chinese University of Hong Kong, and the Hong Kong Laser Eye Center (Cheng), Hong Kong, China.

Journal of Cataract and Refractive Surgery
|April 4, 2017
PubMed
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This study introduces a straightforward steep-axis marking method for femtosecond laser-assisted cataract surgery. It simplifies toric intraocular lens alignment by using a corneal analyzer for precise steep axis identification.

Area of Science:

  • Ophthalmology
  • Surgical Technology

Background:

  • Accurate steep axis marking is crucial for toric intraocular lens (IOL) implantation during cataract surgery.
  • Traditional marking methods can be prone to errors due to patient head positioning and variations in measurement techniques.

Purpose of the Study:

  • To present a novel, simple steep-axis marking technique for use during femtosecond laser-assisted cataract surgery.
  • To improve the accuracy and reliability of steep axis identification for toric IOL alignment.

Main Methods:

  • A single reference mark is placed at the limbus.
  • A corneal analyzer (OPD III scan) is used to determine the angle between the steep axis and the reference line.
  • This angle is utilized intraoperatively to precisely locate the steep axis.

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Main Results:

  • The described technique eliminates potential errors associated with varying head positions during keratometry and slit lamp marking.
  • It offers a reliable method for intraoperative steep axis localization.

Conclusions:

  • This simple steep-axis marking technique enhances precision in femtosecond laser-assisted cataract surgery.
  • The method is applicable for both arcuate keratotomy and toric intraocular lens implantation, improving surgical outcomes.