iTrace Dynamic Laser Refraction: Clinical Application

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iTrace Dynamic Laser Refraction Clinical
Application

• Joe S. Wakil, M.D.
• Chairman, Tracey Technologies, LLC
• and EyeSys Vision, Inc.
• Speaker has a Financial Interest

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Why Dynamic Ray Tracing?Because the Eye is NOT
a Telescope!

• Effects Refraction (ex. Night Myopia)
• Refraction is NOT a FIXED Number!
• Effects Refraction (Instrument Myopia)
• Effects Quality of Vision (Aberrations)

Pupil Size Accommodation Tear Film
Where are the Sources of Aberrations? How do
they change with Surgery?
Astigmatism (Irreg.), Sph other HOA
Astigmatism, Coma other HOA
Cornea Lens
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Aberrometer/Wavefront Technologies

• Hartmann-Shack Lenslet Array
• Tscherning Aberrometer
• Differential Skiascopy
• Ray Tracing
• Features
• -Rapid, point by point, IR measurement - no
  data confusion
• -Pupillometry with auto-tracking/capture
• -Programmable sampling (256 pts.) in any pupil up
  to 8mm
• -Open Field Fixation avoid instrument myopia
  and measure Accommodation
• -Corneal Topography integration able to
  measure Lens Aberrations
• -VISX license for Custom LASIK

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Post LASIK
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Post LASIK
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Post LASIK
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Keratoconus
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Normal
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Normal
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Accommodating IOL
Near Fixation
Change due to Accommodation
Far Fixation
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Advantages of Ray Tracing Aberrometry Combined
with Corneal Topography - iTrace

• Robust dynamic range to measure highly irregular
  eyes including immediately post-op
• Multi-Zone Refraction in seconds to measure
  variations in refraction from normal night myopes
  to post-op results saving chair time
• Able to separate Corneal from Lenticular
  (internal ocular) sources of aberrations with
  EyeSys Corneal Topography
• Improved Diagnostic Wavefront to help in patient
  selection including Custom LASIK and IOL
  procedures
• - Thank You For Your Attention -

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Conclusion

• The Tracey iTrace brings a new standard of care
  in completely assessing vision in terms of
  quality of vision and corneal topography to
  progress visual correction through surgery to
  its ultimate goals.