Starting with version 4.9 the program structure of the Peridata app has completely changed. Some of the various modules are now integrated into the main program, while others are loaded as DLLs. This became neccessary, because Microsoft no longer suppors proven technologies (ActiveX, OCX), and parts of the PeriData program were being blocked by Windows updates. This problem is solved with the new version.
The program interface has not changed. Everything works as before. The internal structure - in particular, data conversion and data storage - has not been altered either. Therefore, data security is not affected by this change.
If you have any questions or encounter any difficulties with the new version, our helpline is, as always, available to assist you.
Oculus Twinfield-3 connected: The new version of the Twinfield perimeter (mark 3) has a different data structure. The new type is chosen in the device list (Options > Perimeter).
New Backup Routine: There is a new backup routine that stores all newly imported visual field data additionally into a monthly database. The directory is defined in the options (settings). The files are named "PeridataBackup-Import-2026-03.phf", e.g. for March 2026. In addition, all raw data files are stored and can be read again later, if data get lost. more
Earlier changes