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DEUTSCH
ENGLISH
FRANÇAIS
ITALIANO
ESPAÑOL
NEDERLANDS
PORTUGUÊS
SVENSKA
© HAAG‑STREIT AG, 3098 Koeniz, Switzerland ‑ HS‑Doc. no. 1500.7006000‑04270 – 2022 – 09
Only part of the lower semicircle (8)
Measuring prism not centred on the eye, eye much too far
to the left.
Using the control lever, move the slit lamp to the
left.
Correct setting (9)
Two semicircles appear exactly in the middle of the
eyepiece.
6.7.3 Position too high / low
Only part of a semicircle in the upper half (10)
Measuring prism not centred on the eye, eye far too high.
Using the control lever, move the slit lamp up-
wards.
Nearly entire circle above, incomplete circle below
(11)
Measuring prism not centred on the eye, eye still too high.
Using the control lever, move the slit lamp up-
wards.
Two incomplete circles, the larger one on top (12)
Measuring prism not centred on the eye, eye still too
high.
Using the control lever, move the slit lamp up-
wards.
Correct setting (13)
Two semicircles appear exactly in the middle of the
eyepiece.
6.7.4 Incorrect pressure
The outside borders of the fluorescein bands are in
contact with each other (14)
Not enough pressure.
Increase the pressure slightly by rotating the knob
on the tonometer.
Fluorescein bands are superimposed to form a band
(15)
Pressure slightly too low.
Increase the pressure slightly more by rotating the
knob on the tonometer.
