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Performing Measurements Capture Modes
Capture Modes The Accutome A-Scan Plus provides two methods of
capturing measurements; Automatic, or ’Auto’, and
Manual. The Automatic mode allows the instrument to
determine, based upon user established criteria, when a
measurement is captured. The Manual mode allows the
user to determine when a measurement is captured.
Auto Mode
When you are using the Auto mode the Accutome A-
Scan Plus uses the definition of automatic measurement
that has been set up in the unit’s preferences.
The user is allowed define the Automatic measurement
mode by specifying how a measurement is
automatically captured. There are a total of three criteria
available and each can be turned off or on by the user on
the Setup screen. The criteria are:
Sclera - automatic capture determined by
sclera detection
Retina - automatic capture determined by
retina detection
Stable - automatic capture determined by
measurement stability
The Auto Mode setting is displayed in the soft menu on
the Measure Screen as ‘Auto (SRS)’, where (SRS)
means Sclera, Retina, Stable. If the feature is ON, the
first letter appears in its place, otherwise a placeholder
‘_’ is displayed.
The default is ’Sclera’, displayed as ‘Auto (S__)’. Sclera
must have a distinct sclera echo after the retina, above
the threshold. Between the Retina and Sclera the signal
must go below the threshold.
’Retina’, displayed as ‘Auto (_R_)’, must begin at the
base line, have no data greater than 10% of the
threshold in front it (for 1.5 mm), and be steeply rising.
"Stable’, displayed as ‘Auto (__S)’, means the
measurement needs to be within a tolerance for a certain
amount of time.
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