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000000Ć1150Ć839 IOLMaster 11.02.2004
Ć Clear signal (SNR > 2.0)
Ć Secondary maxima visible
Ć Relatively clear media
Ć Signal in "Borderline SNR" range of 1.6 ... 2.0
Ć Steep rise of measuring signal
Ć On the display, results of such measurements are marked by an
exclamation mark. Additionally, the message "Borderline SNR"
appears.
This measurement result may be used after verification and comparison
with other data of this measurement series.
Non valid signal curves
Ć Low signal (signalĆtoĆnoise ratio < 1.6)
Ć Error message is displayed.
Ć The measuring signal cannot be clearly distinguished from the
noise.
Possible reasons:
Ć unsteady (non fixating) patient
Ć strong ametropia
Ć dense medial opacity along the visual axis
Repeat the measurement!
Ask the patient to fixate steadily.
Evaluation of ALM results
