14
DEUTSCH
ENGLISH
FRANÇAIS
ITALIANO
ESPAÑOL
NEDERLANDS
PORTUGUÊS
SVENSKA
© HAAG‑STREIT AG, 3098 Koeniz, Switzerland ‑ HS‑Doc. no. 1500.7220449‑04090 – 2021 – 08
6 Operation
6.1 Setting the eyepieces
NOTE!
The eyepieces must be individually set prior to the first examination in
accordance with the refraction of the examiner. Insert the provided focus
test rod (82) in place of the protective cover (83) and turn its black
projection surface at a right angle to the microscope axis. Return the
illumination and microscope to the central position (0°).
Insert the 12.5 × eyepiece with double crosshair into the right eyepiece mounting in
the binocular tube. The depth of the double crosshair on the reticle corresponds to
the film/chip level. The setting is performed from the (+) side to the (-) side at low
magnification until the double crosshair comes into sharp focus.
82. Test rod
83. Protective cover
84. Sliding occluders
• Each eyepiece should be set individually by turning the knurled ocular refraction
ring with dioptre scale until the projected slit can be seen in focus. The setting is
performed from the (+) side to the (-) side at low magnification.
• The sliding occluders (84) are used to set the correct working distance for the
examiner from the eyepiece.
• Examiners who do not wear glasses: Pull the occluders out as far as they will
go.
• Examiners who do wear glasses: Push the occluders in as far as they will go.
6.2 Preparing the patient
• In order to attain a solid basis for the forehead and chin to rest on, the table
height should be selected such that the patient sits bent over forward.
• To ensure that only the part of the eye being examined is illuminated, the slit
height should be set accordingly in order to avoid distracting streaking of light.
• Applied parts which come into contact with the patient (headrest) should be
disinfected prior to every use (see instructions for use 'Headrest').
• The slit lamp must be switched off after every examination in accordance with
the 'Decommissioning' chapter.
6.3 Operating the device
WARNING!
• The device must be switched off after every use. Otherwise there is
a risk of overheating when a protective dust cover is used.
• The slit lamp BX 900 may only be operated with the Haag-Streit
Flash Unit FU 01.
• The slit illumination may only be operated with the flash tube
inserted.
• The images should only be used for documentation purposes. Only
the image in the eyepiece may be used for diagnosis.
• Use the turn screw to set the chin rest in such a way that the patient’s eyes are
at the same height as the black mark on the sides of the headrest.
• Adjust the eyepieces (41) in accordance with the examiner’s refraction by
turning the knurled rings and set the eye distance.
• Switch on the illumination by pressing the switch on the power supply.
• Adjust the height of the slit lamp by turning the control lever (27) until the light
beam and microscope axis are at eye level.
• The magnification of the stereo microscope is changed using the rotary knob on
the magnification changer (5).
• The rigid control lever (27) gently inclined towards the examiner can be used to
push the entire device until the slit appears approximately focused on the
cornea. This initial setting is verified with the naked eye. Fine tuning is
performed by tilting the control lever while observing via the stereo microscope
(18).
• The slit width is set left or right with the rotating knob (11), as is the angle
between the stereo microscope and illumination.