10
Lyric2 work environment set-up instruction
Getting started with the microscope
Please carefully follow the “instruction for use” enclosed in
the packaging when assembling your microscope.
Aim
To have an ergonomic and comfortable seating position
Work effectively on patients’ ear
Smallest possible space requirement
Legroom for the patient
Space requirement
The space provided should be at least 180cm x 200cm.
Facts about the microscope
Magnification: 6,4 times
Weight: 76kg
Working distance: approx. 20cm
Recommended assembly
The recommended layout of the microscope and chair is illustrated
to the right. The advantages are:
The hearing care professional is able to turn the patient chair
without any difficulty.
The alignment of the microscope in this way ensures the best
possible working position for both ears.
A right angle between the short and the long arm of the
microscope improves the handling of the microscope.
Once the microscope is assembled, it is crucial to apply the
breaks and to adjust the resistance of the joints. It is
recommended to opt for a higher resistance for the rotation
of the shorter arm and a lower resistance for the rotation of
the longer arm of the microscope. This will minimize the side
deviation while moving forward with the microscope.
The microscope should be set at a right angle to the long arm.
To perform otoscopy on the patient‘s opposite ear, the chair is
turned around while the patient remains seated. The position
of the hearing care professional and the microscope remains
unchanged throughout.
Step 1 Adjusting eye distance
Important
It is not necessary to have a sharp focus during this step! Before
working with the microscope the eye distance of the oculars needs
to be adjusted to avoid shadows and to ensure a round field of
vision.
First, the oculars are set to the widest distance possible by
turning the dial located on the lefthand side. People who wear
glasses must push back the rubber eye-piece cushions to ensure
the correct distance is maintained between the eyes and the
ocular.
Switch on the light and look through the eye-pieces. Slowly turn
the dial to decrease the distance between the oculars, until a
round sector is visible. There should be no shadow, overlapping
or double images in the centre. Once you are happy with this
image, there is no need to adjust the dial further.
Step 2 Focusing the microscope
Setting the focus of the microscope is only achieved by adjusting
the distance between the microscope and the object to be
examined. There is no need to change the position of the knob or
the eye-pieces in order to get a focused image.
Advice: People who must wear corrective lenses due to spherical
refractive errors when viewing distant objects may set the
corresponding dioptre number on the eye-pieces and adjust the
focus. For further information please refer to the paragraph
below: “Positioning of the microscope oculars“.
Start with the microscope 20cm away from the patient‘s ear.
Slowly move the microscope forward towards the ear until the
image is focused.
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