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