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3.5.2 Measurement
See the user’s manual of AL-4000 measuring unit for the actual procedure
of measurement. This section describes the operations that can be
performed with this instrument during measurement.
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The converted acoustic velocity directly affects the
measurement data. Check that the desired value is set
before starting measurement.
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Check the settings in contact mode and immersion
mode before starting measurement. In immersion
mode, apply an ultrasound media such as cornea
protective agent so that the clearance between the
cornea and the contact section of the biometry probe is
approximately 2.2 – 5.0 mm.
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The automatic measurement function is an auxiliary
function to take measurements more easily. This is not
a function for making actual clinical judgments.
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Be sure to touch the “New” button to delete all the
measurement data of the previous patient before
measuring another patient. If new measurement is
started without deleting the previous data, the
measurement data of the previous patient may be
included.
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