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4.2
Adjusting the eyepieces / eyeguards
Eyepieces
Before the first examination, the eyepieces should be adjus-
ted singly to correspond with the refraction divergence of the
examiner. Insert the provided focusing rod (48) in place of the
protecting cover (14) with the flat projection surface facing the
microscope. Line up the illumination unit and the microscope
in the central position (0
°
).
Adjust each eyepiece separately, by turning the knurled ring
with the diopter scale separately, until the projected slit is seen
in focus. Adjust from (+) to (-) at low magnification.
Younger examiners are recommended to make an additional
correction on both eyepieces of - 1 to - 2 diopters each, to
compensate for the accommodation that occurs as a result of
convergence when conducting binocular examinations. The
requisite pupil distance on the microscope can then be adjus-
ted.
Eyeguard
The adjustable eyeguard serves to set up the correct working
distance of the examiner to the eyepiece.
For examiners without spectacles:
pull out the eyeguard fully to the extended position.
For examiners wearing spectacles:
push in the eyeguard fully to the retracted position.
Eyepiece with prism housing
25 Prism housing
49 Index (white spot)
50 Knurled ring with diopter scale for setting the refraction
of the examiner (
±
8 D)
51 Sliding eyeguard
4.3
Possibilities for regulating the brightness
The brightness of the slit light illumination can be varied by
means of
• the knob on the instrument base which adjusts the intensity
of the slit illumination
• the 10 % grey filter on the upper part of the illumination
unit of the slit lamp
48
14
25
49
50
51
