Zeiss HUMPHREY 720i User Manual - page 149

FILE FUNCTIONS

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REV. B 02/03 PN 51680-1

HUMPHREY FIELD ANALYZER II -

 i

series

The COMPARE TESTS feature subtracts the results of two threshold tests and indicates the

decibel difference at each point. This comparison is useful, for instance, for tracking the

deterioration in a patient’s visual field on tests for which STATPAC is not available. The results

are displayed on the screen and may be printed.

The COPY TESTS function copies any number of tests from one storage medium to another. Use

this function when copying one or more tests from the hard disk to a floppy disk and vice

versa, or from one floppy disk to another floppy disk.

 The MOVE TESTS function transfers tests from one storage medium to another. Unlike the

Copy function, this function deletes the selected test(s) from the source disk at the same time

that it moves them to the destination disk.

The DELETE TESTS function permanently erases tests from either the hard disk or floppy disk.

When deleting a single test, the test contents will be displayed on the screen before the delete

action is executed. When multiple tests are chosen, they are not displayed first.

Patient tests may be transferred from an older Humphrey Field Analyzer model (either the HFA

I or an earlier HFA II) to the HFA II - i series instruments via the Data Transfer port by using

the TRANSFER TESTS command. The proper serial cable connection is required to connect the

instruments. You can transfer approximately 1,440 tests per hour at a 9600 baud rate. See

“Transferring Tests Between the HFA I and HFA II” or “HFA II and II - i series” in this section.

The BACKUP/RESTORE function allows you to back up or save tests stored on the hard disk to

either magneto-optical or floppy disks. Neither backup method allows the user to pick and

choose which tests should be backed-up. The entire database will be backed-up. Use this same

feature to restore information to the hard disk, if necessary. Extensive information on the

BACKUP/RESTORE feature is found in Section 9. Be sure you use only formatted disks.

It is important to regularly back up all of your databases to ensure that you can

access all of your tests even if the originals become damaged or lost.

Notes:

1.

Backing-up tests will erase all information on the destination disks or magneto-

optical disk(s) and replace it with the information from the source disk. Therefore,

we advise rotating among multiple magneto-optical disks or backup disk sets.

2. Restoring tests from floppy disk or magneto-optical disk(s) will erase all information

on the hard disk and will replace it with the information from the source disk(s).

Data from the magneto-optical disks or backup floppy disks may be merged onto the

hard drive to add tests from the magneto-optical disks or backup floppy disks that do

not exist on the hard drive. See Section 9: “Merge Database”.

DATABASE STATUS gives information on the number of tests and the number of patients found

on the hard disk and floppy disk databases.

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