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Measurement of Femtosecond Laser Corneal Flaps |
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Direct Measurement
of Femtosecond Laser Corneal Flaps
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Direct measurement of
corneal flaps during Lasik surgery, without the need for
subtraction pachymetry, has been a highly desired feature
for
refractive surgeons. Until today, many surgeons calculate the
thickness of the flap with the use of subtraction
pachymetry technique which is not very accurate and requires
a secondary measurement from the corneal stroma. But it is the ability to accurately measure
corneal flaps
prior to the lift that provides surgeons with
truly valuable information at a time that is most crucial -
before the lift.
Direct flap measurement
becomes even more important as the industry moves towards
the Sub-Bowman Keratomileusis
, or SBK. With the
thinner flaps the margin for error becomes even smaller and
the need for precise measurements even more critical.
PalmScan P2000 and AP2000
pachymeters, with the FS Flap option, are now capable of
measuring flaps cut with a femtosecond laser machine with
extreme precision (3 micron accuracy).
The flap measurements are made off of the bubble layer generated
by the femtosecond laser cut.
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Advantages of
Direct FS Flap Measurement
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Measuring
flaps prior to the lift ensures that
- Integrity
of the flap will not become compromised during
the lift due to thinner than expected flaps.
- You may
decide not to lift the flap if it is thicker
than expected and it does not provide you with
sufficient stromal bed.
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Eliminate
errors associated with subtraction pachymetry
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Differences in pre and post op location and orientation of the probe induce measurement
errors
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| Reduce
chances of corneal infections by eliminating the
need for contact
between the pachymeter probe and the corneal bed. |
| Ensure that
the femtosecond machine you are using is cutting
within its calibration limits. |
Take advantage of our 30 day risk-free trial offer!
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Place the system in "FS Flap Mode". |
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After the FS flap has been cut, you have about a minute to
measure the flap's thickness. We recommend that you place
the device in "Continuous Capture" mode and while keeping
the probe tip as perpendicular as possible to the cornea,
softly move the probe across the center of the cornea.
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Once a capture has been made, you can verify the flap
measurement by navigating to the C-Wave page. This image
depicts the corneal waveform capture of femtosecond flap
(Phase view option).
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