User's Manual Part 5

6.14

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Using the Optics Overband

The pivoting overband allows the laser optics to be pushed up out of the operator's ﬁ eld of

view (see Figure 6-11). It is locked in the end position and can only be released by pressing

the Overband Adjustment Knob.

To pivot the overband, press the Overband Adjustment Knob with the right hand and pivot

the overband into the desired position (up for the “rest” position and down for the “working”

position). When the unit is properly adjusted, the overband can be lowered into the same

pre-selected working position. Once set, changing the adjustments is required only if another

examiner uses the instrument.

Figure 6-11 Adjusting the LIO-AT Overband

Observation Optics Adjustment

1. Loosen the Observation Optics Adjustment Knob (see Figure 6-36) so that the

observation optics are free to move. The Observation Optics Adjustment Knob can be

unscrewed and reversed to the other side for left-handed operators. Remove dust cover

protecting delivery window.

2. Place the LIO-AT on your head and adjust the circumference and height using the

Circumference and Height Adjustment Knobs so that the headband is ﬁ rmly positioned

but comfortable.

3. For convenience, use clothing clip to attach the ﬁ ber/cable assembly to clothing.

4. Move the eyepieces as close as possible to your eyes and look at the light spot at a

distance of 30 cm. A small object (such as a pencil) held in front of the eyepieces at 30

cm must be clearly focused.

5. Using the Delivery Mirror Control Knob, adjust the optics so that the light spot

is centered vertically in your ﬁ eld of view, then tighten the Observation Optics

Adjustment Knob.

6. If the light spot is not centered horizontally, adjust the headband left or right

accordingly.

7. Adjust the pupil distance setting by viewing the light spot alternately with the left eye

then the right eye, and sliding the eyepieces so that the spot is centered within your

ﬁ eld of view.