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© HAAG‑STREIT AG, 3098 Koeniz, Switzerland ‑ HS‑Doc. no. 1500.7006000‑04270 – 2022 – 09
4.5 Which slit lamp with which tonometer
AT 900 model R
AT 900 model T
AT 900 model BQ
Model R
Model T
Model BQ
AT 870
BD 900
•
BM 900
•
•
BI 900
•
•
BP 900
•
•
BQ 900
•
•
BX 900
•
•
Various
•
4.6 Description of models
• The Applanation Tonometer
AT 900 model R
can be left on the slit lamp per-
manently. It is fastened to the microscope on a mounting base and swivelled in
front of the microscope for the examination. The observation of the applanated
surface is conducted monocularly – only through the left eyepiece.
• The Applanation Tonometer
AT 900 model T
is set on the guide plate over the
slit lamp axis, for tonometry purposes. The device can be moved between two
positions on the guide plate for observation through the right or left eyepiece.
The sensor arm with the measuring prism projects from the bottom side into the
beam path of the microscope and the illumination.
• The Applanation Tonometer
AT 900 model BQ
has a working position and two
resting positions. To set the correct angle of incidence of the illumination, the
tonometer is swivelled and the illumination apparatus is positioned to the left of
the tonometer bracket. The patient's left and right eyes can be easily examined
in this position (no 60° position). The applanated surface is observed monocu-
larly through the right eyepiece of the stereo microscope.
• The Applanation
Tonometer AT 870
is positioned over the slit lamp's (from oth-
er manufacturer) microscope. The feeler arm projects into the microscope and il-
lumination beam path from above. The tonometer is ready for use with a single
swivel movement of the feeler arm.
NOTE!
The instructions for devices from other manufacturers are to be ob-
served.
5 Commissioning
WARNING!
It is imperative to read the 'Safety' chapter and to observe its precau-
tions before operating the device.
NOTE!
A smooth operation can only be guaranteed with the use of original
Haag-Streit measuring prisms and Tonosafe.