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Zeiss IOLMaster Customer Service: 1-877-486-7473 ext.
4030
IOLMaster — Anterior Chamber Depth
Error Messages / Incorrect Settings.
Measurement Errors
The "Error" message usually have
two basic causes:
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The results of the five internal individual measurements vary by more than 0.15
mm (very rare), or
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The images produced (optical sections) do not contain relevant structures (normally
without the edge of the crystalline lens), or disturbances are preventing their
detection.
Incorrect Settings:
Defocused Image
If the IOLMaster is not optimally focused, the image of the fixation point
will be larger and fainter. At the same time, the images of the front edge
of the lens and/or the cornea may become so faint that they cannot be recognized
as such. In such a case, the system displays an "Error" message
and an explanatory text indicates which image details are either missing or
could not be recognised correctly.
Improve the focus adjustment of the IOLMaster and repeat the measurement. The
fixation point must be optimally focused.
 Note:
As a rule, a slight defocusing of the IOLMaster does not have a significant
affect on the anterior chamber depth measurement.
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IOLMaster Checklist (pdf)