Application guidelines for Reference Image measurement
000000-1865-713-GA-en-US-080622
Fluctuations in keratometer values
The precision and repeatability of keratometer measurement values,
especially those relating to the axial orientation of the main meridians, are of
particular significance for measurements in Reference Image mode.
Error message: "Borderline keratometry"
Axial variations in single measurements of keratometry values are too strong
in relation to the astigmatic difference of the main meridians.
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. If the quality of the keratometer measurement values cannot be
improved, check the corneal curvature of the patient for irregularities using
corneal topography. The patient is possibly not suitable for toric intraocular
lens implants.
Fault
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