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Six-month experience in Ocular-Wavefront-guided
customised with the SCHWIND AMARIS Total-Tech
Laser 6D Eye-Tracker: Clinical Outcomes
Maria C. Arbelaez, MDSamuel Arba Mosquera, MSc
Financial Disclosure: E (MCA), Y (SAM)
Not FDA approved
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Purpose
To evaluate:-postoperative clinical outcomes-High Order Aberrationsin eyes that have underwent
-LASIK treatments-with 6D Eye-Trackerusing the
- SCHWIND AMARIS laser system
Study protocol
Patients
-58 eyes (35 Aberration-Free + 23 OW)-preoperative myopia up to -6.25 D-3-month follow-up
Materials
-pre-/post-operative Wavefront Analysis-Ziemer LDV femtosecond laser-SCHWIND AMARIS Total-Tech laser
Methods
-Clinical outcomes-Predictability
-Refractive Outcome-Safety-Wave Aberration
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Patient Population and Average ValuesMetric Unit AF OW
Number of eyes n 35 23
Age at op Years 33 (19 to 49) 35 (22 to 52)
Gender (F/M) % F: 54%
M: 46%
F: 61%
M: 39%
Eye (OD/OS) % OD: 51%
OS: 49%
OD: 48%
OS: 52%
Pre-op SEq D -3.031.47
(-6.25 to -0.50)
-1.510.73
(-3.25 to -0.25)
Pre-op Ast D 2.030.56
(1.50 to 3.50)
0.800.39
(0.00 to 3.50)
Pre-op RMS(HOA)
at 6-mm
m 0.330.15
(0.09 to 0.87)
0.530.13
(0.34 to 0.98)
Post-op SEq D -0.130.18
(-0.50 to +0.25)
-0.120.17
(-0.50 to +0.25)
Post-op Ast D 0.150.25
(0.00 to 0.75)
0.150.25
(0.00 to 0.75)
Post-op RMS(HOA)
at 6-mm
m 0.340.14
(0.15 to 0.62)
0.350.18
(0.10 to 0.89)
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AMARIS: Cooperative patient
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AMARIS: Non-cooperative patient
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AMARIS: Mean movements
(58 treatments)
Very good fixation
Good levelling
Natural rolling
Static cyclotorsion
X Y Z
RollX RollY SCC
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AMARIS: Dynamic range of movements
(58 treatments)
Dynamic fixation (Saccades)
Good levelling
Dynamic rolling (Saccades)
Dynamic cyclotorsion
X Y Z
RollX RollY DCC
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AMARIS: 3rd and 4th Dimensions movements
Fixation horizontal movements (Saccades)
were in general within 5 deg
Fixation vertical movements (Saccades)
were in general within 5 deg
Static rolling
Dynamic rolling
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AMARIS: 5th Dimension movements
Cyclotorsional movements were in general within 5 deg
SCC
DCC
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AMARIS: 6th Dimension movements
Z-movements were in general within 500 m
Static Z
Dynamic Z
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Why is 6D Eye-Tracking so important?
Uncompensated pupil
movements induce coma
Uncompensated rolling
movements induce coma
Uncompensated
Compensated
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Why is 6D Eye-Tracking so important?
Uncompensated cyclotorsional
movements induce aberrations
Uncompensated Z-movements
induce undercorrections
Uncompensated
Compensated
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AMARIS: Refractive Outcome
Mean 95% Conf.Int. min MAX
0.150.25D [0.00D,0.67D] 0.00D 0.75D
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AMARIS: Change in Aberrations at 6-mm diameter
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6D Eye-Tracker with AMARIS yield excellent outcomesRefractions were reduced to subclinical valuesMean defocus was -0.120.17D and astigmatism 0.150.25D70% eyes were within 0.25D of emmetropia
19% eyes gained lines of BSCVARate of registration for Cyclotorsion was100% for Cyclotorsion90% for Rolling and Axial movements
Mean Rolling was within 5 in 52% of the casesDynamic Rolling was within 5 in 66% of the casesStatic Cyclotorsion was within 4 in 69% of the casesDynamic Cyclotorsion was within 2 in 72% of the casesZ-movement was within 0.5mm in 69% of the cases
6D Eye-Tracker: Conclusions
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Thank you very much
for your kind attention!