Preparing The Slit Lamp Instrument For Examinations At 10X Magnification; Using The Instrument / Taking A Measurement - Keeler D-Kat R Gebrauchsanweisung

Reusable prisms are not disinfected prior to shipping and must be cleaned
before their first use as described in Section 3 of this document.
Check prisms for damage prior to use.
7.3 PREPARING THE SLIT LAMP INSTRUMENT FOR EXAMINATIONS AT 10X
MAGNIFICATION
• Before beginning measurement, check that
the eyepieces of Slit Lamp are correctly
focused.
• Set the brightness control of the
instrument to a position of a low intensity.
• Set the illumination angle of the Slit Lamp
to be approximately 60° to minimise
unwanted reflections.
• Insert the blue filter on the slit lamp beam
path and fully open the slit diaphragm.
Clean and disinfect prism as described in Section 3 of this document.
• Place the doubling prism on into the holder and align the 'zero mark' with the white
alignment line on the prism holder, this ensures the mires have a horizontal split.
• Insert the measurement arm so that the measurement head and microscope optics axes
are convergent.
• Rotate the measurement drum until 10.0 is displayed on the LED.

7.4 USING THE INSTRUMENT / TAKING A MEASUREMENT

Instructions to the patient
• The patient's head must be firmly positioned on the chin rest and the forehead rest. If
necessary, a band may be used to hold the head still.
• Ask the patient to look straight ahead. If necessary, use a fixation target to keep the eyes still.
• We recommend occasionally reminding the patient during the examination, to keep his /
her eyes wide open. If necessary, the examiner may use the tips of his fingers to hold the
lids open, taking care not to exert pressure on the eye.
• When elevating the lids, the angle between the microscope and the lighting unit must be
reduced to about 10° so that the light beam passes through the body of the prism. In this
D-KAT Tonometer by KEELER
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