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© HAAG-STREIT AG, 3098 Koeniz, Switzerland - HS-Doc. No. 1500.7200492-04150 – 15. Edition / 2017 – 01
DEUTSCH
ENGLISH
FRANÇAIS
ITALIANO
ESPAÑOL
NEDERLANDS
PORTUGUÊS
SVENSKA
DEUTSCH
ENGLISH
FRANÇAIS
ITALIANO
ESPAÑOL
NEDERLANDS
PORTUGUÊS
SVENSKA
5.5 Fixation star
•
Turning the diaphragm disc to the left stop switches on the fixation star
and the 'S' symbol appears in the viewing window. In some examina-
tions of the fundus, this star is projected onto the ocular fundus and is
also visible to the patient, who is asked to focus on the center hole of
the star. This shows the examiner the point where the patient's vision
is most focused.
•
A typical use of the fixation star is close to the macula during laser tre
-
atment. The projection of the fixation star can also be used to identify
microstrabismus. The fixation star is usually used with upstream red
removal filter.
5.6 Microscope and eyepiece
The magnification of the microscope can
be altered by changing the lens mounted
in a revolving turret piece or by exchang-
ing the eyepieces. Only the lever (48) is to
be adjusted, from 1x to 1.6x, when chang-
ing the lens. In this instance, the examina-
tion need not be interrupted; nor is a new
adjustment of the microscope needed. This
change will alter the overall magnification
from 10x to 16x (on the 10x eyepiece) and
from 25x to 40x (on the 25x eyepiece) re-
spectively.
48
47
46
45
44
43
42
42.
Magnification changing lever
43. Prism housing
44. Eyepiece mounting
45. Dioptre scale for 16x eyepieces for
setting the refraction of the examin-
er (± 8 D)
46. Dioptre scale for 10x eyepieces for
setting the refraction of the examin-
er (± 8 D)
47. Index (white point)
48. 10x or 25x eyepiece
6. Decommissioning
The LED illumination can be switched off with the illumination control. The device
power supply remains switched on and the switch illuminates green. To switch the
system off completely, the rocker switch must be set to the 0 = 'OFF' position. This
results in double pole disconnection from the mains.
NOTE!
Disconnect the power supply from the mains if you do not intend to use
it for an extended period of time.
7. Technical data
7.1 Slit illumination
NOTE!
Detailed information regarding the radiation can be provided
on request.
Spectral range slit illumination
400 to 750 nm
Spectral range background
illumination
400 to 750 nm
Slit image width
0-8 mm continuous
Slit image length
1-8 mm continuous
Illumination field circle
8 / 5 / 3 / 2 / 1 / 0.2 mm in ø
Test mark
with fixation star
Slit image rotatability
0-90°
Inclination of slit illumination to mi-
croscope axis
Horizontal ± 90°, vertical 0-20°
Filters
Blue, red removal (green), grey (10%)
NOTE!
Further information is available in the LED illumination LI 900 instruc-
tions for use.
7.2 Stereo microscope
Stereo angle
13°
Magnification changer
1x and 1.6x
Magnif. with 10x eyepiece
10x and 16x (standard)
Magnif. with 25x eyepiece
25x and 40x
Range of adjusting eye-8 to -8 dioptres
Pupil distance
54 – 94 mm
Lens
1x / 1.6x / 1x / 1.6x
Eyepiece
10x / 10x / 25x / 25x
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