Download Tracey VFA - Tracey Technologies, Corp.

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!
Pupil Size: Effects Refraction (ex. Night
Myopia)
Accommodatio Refraction is NOT a FIXED Number!
n: Effects Refraction (Instrument
Myopia)
Tear Film:
Effects Quality of Vision
(Aberrations)
Where are the Sources of
Aberrations?
How do they change with Surgery?
Cornea: Astigmatism (Irreg.), Sph & other
HOA
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 autotracking/capture
-Programmable sampling (256 pts.) in
any pupil up to 8mm
-Open Field Fixation – avoid
instrument myopia and measure
Accommodation
-Corneal Topography integration –
Post
LASIK
Post
LASIK
Post LASIK
Keratoconu
s
Normal
Normal
Near Fixation
Accommodating IOL
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 postop
• 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
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.