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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. Why Dynamic Ray Tracing? Because… the Eye is NOT a Telescope!. Effects Refraction (ex. Night Myopia)
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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
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:
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
Accommodating IOL Near Fixation Change due to Accommodation Far Fixation
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 -
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.