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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!