Analysis with Optical Coherence Tomography of the LASIK Flap created with the CarriazoPendular Micro

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Analysis with Optical Coherence Tomography of the
LASIK Flap created with theCarriazo-Pendular
Microkeratome

• Dr. Diego de Ortueta FEBO
• Medical Director
• Augenzentrum Recklinghausen
• Germany
• www.augenlaserzentrum.org
• Consultant Schwind eye-tech-solutions

ASCRS 2007 San Diego
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Purpose

• To evaluate the homogenity of a LASIK-flap cutted
  with the Carriazo-Pendular Microkeratome (Schwind
  eye-tech-solutions, Kleinostheim Germany).
  Measurement had been performed with the Optical
  Coherence Tomography VISANTE TM Carl Zeiss
  Meditec (Jena, Germany).

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Optical Coherence Tomography

• Non contact procedure
• 1310 nm Infrared wavelength blocked by pigment
• We took 5 images per eye mode high resolution
  cornea
• Resolution of the system with /- 12µm

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Carriazo-Pendular Microkeratome

• Advance automated 2 Motors
• backwards without oscillation
• curved Blade
• Hinge position at 360 possible
• we perform a superior hinge
• We use the head 110µm ,130µm and 150µm

Carriazo-Pendular
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Linear Cut with the Carriazo- Pendular
Microkeratome
With other Microkeratomes we get a
circumferential movement
with the Pendular we get a linear movement
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Example of high resolution image after 1 week
LASIK
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We got a planar flap with the differents heads,
in this case the 110 head
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Image with the 130 Head showing also a planar cut
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quick transverse edge of entering in the desired
cutting plane.
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Conclusions

• With the Carriazo-Pendular Microkeratome we get
  planar cuts
• The limitation of the study is the resolution of
  the system with /-12 µm which corresponds to the
  standard deviation of the cut with the Carriazo
  Pendular
• After two weeks we had difficulties to recognize
  and analyze the flap thickness