Publicité
3. Switch on the illumination unit by activating the power supply
switch. Control level of slit illumination by pushing button (46)
on control lever (56).
• 1x click: 1 position brighter
• 2x click: 1 position less bright
• Press and hold down the button: goes to maximum
brightness and back after release.
LI 900
see separate instruction manual
®
4. Rotate the control lever (56) until the light beam is at eye level.
5. Microscope magnification is changed by rotating the
magnification changer (52).
6. Holding the control lever (56), inclined towards yourself, move
the instrument base until the slit appears to be approximately
in focus on the cornea. This coarse setting is achieved with
the naked eye. Fine adjustments are obtained by rotating
and tilting the lever while observing the image through the
microscope (50).
7. The slit width is adjusted to the left or right by means of the
knob (55), which also adjusts the angle between the microscope
and the illumination unit.
8. The slit image is made vertical, horizontal, or given any
desired angle by means of control knob (49) (notches at 45°,
90° and 135°; stops at 0° and 180°, markers in 10° steps).
9. In order to ensure the possibility of conducting a binocular
fundus examination in optical cross section without difficulty
from side angles between 3 and 10°, the shorter mirror (51)
should be installed, the illumination unit is rotated through
90° with the knurled control knob (49) and with the latch (54)
in stages of 5°, the illumination unit and the microscope are
turned to the center position (0°).
10. Loosening the centering screw (53) will allow the slit image
to be moved off center for scleral illumination. Tightening
the screw will recenter the slit image in the visual field of the
microscope.
11. For general observations over a wide field the grey filter
is placed in position by means of lever (48), and the slit is
opened wide.
12. For examination of the posterior of the eye, preset lenses
or diagnostic contact lenses have to be used.
Filters (48) / apertures (47) operating (49)
57 Open aperture
58 Grey filter (10%)
59 Redfree filter
60 Empty space for accommodating an add. filter
61 Fixation star (particularly suitable for examining the
fixation in amblyopia)
62 Apertures producing areas of 8, 5, 3, 2, 1 and 0.2 mm ø
63 Indication of wedge-shaped diaphragm for continuous
slit length adjustment in mm
64 Blue filter
1x
46
47
48
49
50
51
52
53
54
55
56
61
1500.7200615.04030
2x
gedrückt halten
presser et maintenir
press and hold
57
58
59
62
© Haag-Streit AG, 3098 Koeniz, Switzerland
3
3
60
63
64
Publicité
Chapitres
