Recommended Standard Treatment Procedures
000000-1254-918 RSTP – LASIK for MEL 80 30.08.2004
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18.
Check the patient data and the eye to be treated. If necessary, you can correct the patient data
now. In this case, click the <
Calculate
> button, to start the calculation of the correction program.
19.
Position the patient on the bed so that the patient’s eye is comfortable in the position required.
20.
It may be favorable to wipe the inner side of the lids with a triangular swab soaked with
anesthetics (1% Xylocaine, no preservatives) in order to reduce irritations and thus avoid increased
production of tear fluid.
21.
Cover the operation area with a fenestrated adhesive drape and drape it in such a way that the
lashes are folded back over the margin of the eyelid.
22.
Microscope setting: Magnification 0.6x.
23.
Coarsely adjust the patient bed using the focusing beams.
24.
Use an eyelid retractor.
25.
Apply a drop of an anesthetic (e.g. Oxybuprocain-HCl) (not yet in the other eye if you plan bilateral
treatment).
26.
Open the lid retractor as wide as the patient can just tolerate. Fine align the patient bed so that
the iris is in the center of the palpebral fissure.
27.
Using gentian violet, mark the cornea non-symmetrically.
28.
Rinse excessive dye away.
29.
Perform the keratome cut following the instructions for use of the keratome. Do not open the flap
yet.
30.
Microscope setting: Magnification 1.0x.
31.
Again, accurately position the patient's eye with the patient bed.
32.
Swing in the CCA+ unit taking care that the position of the patient's eye remains stable.
33.
Have the patient look at the green, blinking LED (Note: The patient's eye must be in the center of
the field of view; microscope setting: magnification 1.0x). Tell the patient that the aiming beam
will outshine the blinking LED.
Treatment
34.
Activate the eye tracker.
35.
The eye tracker automatically sets the aiming beam to the center of the entrance pupil ("line of
sight"). To choose another centration point, use the offset keys. For that, turn on the satellite
illumination, if necessary.
Note
Since the fixation light is central, it is advisable to center the patient's right eye with the surgeons
left eye and vice versa to avoid parallax errors.
36.
Open the flap and settle it on a sterile LASIK shield soaked in BSS; the inside of the flap must not
be touched throughout the treatment.
