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Related Experiment Videos

Clinical experience with the Tracey technology wavefront device.

I G Pallikaris1, S I Panagopoulou, V V Molebny

  • 1Department of Ophthalmology, Vardinoyannion Eye Institute of Crete, University of Crete, Greece. ophadmin@med.uoc.gr

Journal of Refractive Surgery (Thorofare, N.J. : 1995)
|October 6, 2000
PubMed
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Spatially resolved refractometry using Tracey technology offers a comprehensive ocular refraction profile. This wavefront device shows potential for clinical applications in refractive surgery, though further accuracy improvements are needed.

Area of Science:

  • Ophthalmology
  • Biomedical Engineering
  • Optical Physics

Background:

  • Refractive surgery outcomes depend on accurate total ocular refraction measurement.
  • Current methods often focus solely on corneal measurements, neglecting other ocular components.
  • Tracey technology, developed through international collaboration, introduces a novel approach to ocular analysis.

Purpose of the Study:

  • To report the initial clinical experiments using spatially resolved refractometry with ray tracing principles.
  • To evaluate the Tracey-1 device for measuring the total ocular refraction profile.
  • To assess the potential of this technology in refractive surgery.

Main Methods:

  • The Tracey-1 device was compared against conventional videokeratoscopes.

Related Experiment Videos

  • Reproducibility was tested by measuring pseudophakic and phakic eyes 30 times each.
  • Measurements were analyzed in 6mm zones, calculating astigmatism parameters and their statistical variations.

    • Main Results:

    • The study achieved a standard deviation of approximately 0.14 Diopters.
    • Reproducibility testing demonstrated consistent measurements across multiple trials.

    Conclusions:

    • The Tracey Technology wavefront device provides refractive data at the eye's first principal plane.
    • Transposing data to the corneal plane is necessary for direct clinical application.
    • The device shows promise for measuring accommodative amplitude and range, with potential for future refractive surgery advancements.