Selecta
PBL200051, Rev J
68 Operation
Preoperative Setup of the Slit Lamp and Laser
WARNING - Do not use the device if the illumination is not present or
cannot be made to appear after adjusting slit knobs.
WARNING - Use caution when adjusting the table up and down to prevent
patient injury or discomfort.
Focusing the Slit Lamp
To ensure that there is no focal shift between magnifications and to provide
maximum working distance with the contact lenses:
1 Turn on the system as instructed in “Turn on the system” section of this
manual.
2 Affix a paper target on the headrest so that it is visible through the slit lamp
eyepieces. Do not use the slit lamp focus post as a target.
3 Use detail on the paper within the field of view as a focusing target, and adjust
the aiming beam intensity to the lowest setting, until it is not visible.
4 Set the binocular eye piece diopter setting to 0.
5 Set the magnification to the highest setting, and focus the slit lamp on the
target. Lock the slit lamp base.
6 Set the magnification to the lowest setting. Adjust the eyepieces, alternating
from + to - to achieve the best focus on the target; complete the procedure for
each eye.
7 Set the magnification to the highest setting. Unlock the slit lamp base, and
focus the slit lamp on the target. Lock the slit lamp base.
8 Set the magnification to the lowest setting. Adjust the eyepieces, alternating
from + to - to achieve the best focus on the target; complete the procedure for
each eye.
9 Note the index number of the slit lamp eyepieces relative to the index marks as
a future starting point for this procedure.
10 View the target through the eyepieces, and adjust the focus to obtain the
smallest spot on the target.
11 Remove the paper target from the headrest.
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