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Tracey Technologies AAO 2004Tracey Technologies AAO 2004Advisors Group BreakfastAdvisors Group Breakfast
Tom Padrick, PhDTom Padrick, PhD
Director of EngineeringDirector of Engineering
Baylor Clinical StudyBaylor Clinical Study
100 Eye Study – Comparison of Tracey Refraction Values with Manifest Refraction
Done Under Supervision of Mitch Weikert, MD and Doug Koch, MD Baylor College of Medicine, Houston
Baylor Clinical Study Baylor Clinical Study (100 eyes)(100 eyes)
-13D
+7D
Baylor Clinical Study Baylor Clinical Study (100 eyes)(100 eyes)
Baylor Clinical StudyBaylor Clinical Study
Physical Object TestingPhysical Object Testing
Study to determine accuracy and reproducibility of iTrace measuring spherical lenses, cylinder lenses, induced spherical and coma aberration and calibrated phase plates
Jim Schiegerling, PhD, Optical Science Center, University of Arizona, Tucson
University of Arizona University of Arizona (Physical Testing)(Physical Testing)
University of Arizona University of Arizona (Physical Testing)(Physical Testing)
University of ArizonaUniversity of Arizona (Physical Testing)(Physical Testing)
Accommodation Measurement withAccommodation Measurement withTracey Technologies Tracey Technologies iiTraceTrace
Only aberrometer that allows true distant and near point measurement (through instrument viewing) of wavefront and refraction (difference display shows accommodation)
Data show excellent agreement between iTrace measurements and standard pushup test over range of 1D to 4D of accommodation as tested by Dr. Adrian Glasser
Variations inVariations in
Mapping Mapping
AccommodativAccommodativee
Power in the Power in the
Natural Natural
Crystalline Crystalline LensLens
asas
Measured byMeasured by
iTraceiTrace
Vertical Cyl
Horizontal Cyl Piston
Coma
Accommodation and Lenticular Accommodation and Lenticular AberrationsAberrations
Accommodative Power
Far Aberrations
Refraction Difference Map
Near Aberrations
Horizontal Cyl
Accommodation and Lenticular Accommodation and Lenticular AberrationsAberrations
Accommodative Power
Refraction Difference Map
Far Aberrations Near Aberrations
Coma
Accommodation and Lenticular Accommodation and Lenticular AberrationsAberrations
Accommodative Power
Refraction Difference Map
Far Aberrations Near Aberrations
Vertical Cyl
Crystalens Accommodative ArchingCrystalens Accommodative Arching
73 Year Old Male
Overall Refraction change is 0.5D but Central Cylinder 2.5 D adds Depth of
Field to Enhance Accommodative Effect
Accommodation StudyAccommodation Study
Planning a 300-500 eye study over a range of ages to measure “accommodation types” in natural crystalline lens as a function of age
Plan additional work with doctors and manufactures of accommodative IOLs