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Performing
Measurements
Overview The Accutome A-Scan Plus is very simple to operate,
and has advanced features to help you obtain the best
possible measurements.
The Accutome A-Scan Plus takes measurements by
sending a signal through the eye through the ultrasonic
probe. The signal echoes off the various parts of the eye
(cornea, lens, retina) and returns a signal through the
probe. The returned signal is translated and displayed
as the Patient waveform. The Accutome A-Scan Plus
examines each of the echoes in the waveform and
calculates the measurements from one echo to the next.
All measurements are then displayed on the Measure
Screen. The number of echoes detected is determined
by a user selectable eye type, including Phakic, Aphakic,
and Pseudophakic.
Five waveforms can be captured for each eye. Review
and gate adjustment can be done after waveform
capture to ensure proper measurement.
The Accutome A-Scan Plus provides many user controls
to obtain accurate measurements. These include the
support for contact or immersion method, individual
velocities, automatic capture of readings, gain control,
manual and automatic gate adjustment, and zoom.
During measurement, the instrument will provide audible
feedback of contact, signal quality, and capture.
This chapter provides you with information to control,
capture, and review waveforms.
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