ALADDIN
- User manual
Rev. 19 EN of 10/07/2019
46
11.5 Acquisition: general instructions
11.5.1 Positioning the patient
To obtain correct measurements it is necessary an adequate positioning of the patient relative to the device.
A steady head position and the correct device-to-patient distance are obtained by resting the patient’s head
well against the chin rest and forehead band. The patient must look steadily at the fixation point in the center
of the Placido disk.
A correct alignment with the patient’s pupils can be visually checked by the operator referring to the two
lines on the forehead supports (see the red arrows in Figure 25).
Figure 25
The working distance from the device to the eye is 80.0 mm. The software guides the operator in order to
reach the ideal focus condition (see paragraph 11.6 )
The joystick illustrated in Figure 26 is the only part the user has to
physically control during acquisition. The button on the top marked
"Acquisition button" starts the acquisition of the various
measurements.
The thumb wheel marked "Height Regulation" allows you to adjust
the instrument's height according to the patient's position.
If the adjuster on the joystick is not enough to achieve the correct
position, move the knob on the chin rest for adjusting the height
Figure 26
Make sure the
patient's forehead is
well up against the
forehead rest.
The position of the chin
rest must be both
comfortable and
correct, i.e. it must
allow the person
performing the
measurement to center
correctly on the fixation
LED.
Содержание ALADDIN HW3.0
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