Application guidelines for Reference Image measurement
000000-1865-713-GA-en-US-080622
Excessive eye movements prevent images of sufficient quality
from being obtained
In some cases, eyes may move considerably during image capture. Excessive
eye movements prevent sufficient quality of the reference image.
Fig. 16 Excessive eye movements prevent images of sufficient quality from being obtained
Error message: "Unstable fixation."
The area in which vessels near the limbus can be detected is not in focus.
Accurate detection of vessels near the limbus is not possible.
Repeat the measurement and ask the patient to focus on the central fixation
light. Instruct the patient to blink shortly before the measurement, to
produce a continuous tear film. This will improve the reflectivity of the
cornea.
Remedy
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