To build a open source software library and community to assist with programming perimeters for novel vision research.
A working group of interested academics and industry representatives has been established to work on two projects. Special meetings hosted in Tub-ingen, Halifax, and during several conferences (IPS, NAPS, ARVO) have established a groundswell of enthusiasm for the project.Two initiatives are underway: Visualfields, an R package containing a set of analysis tools; and the Open Perimeter Interface (OPI), a standard for pro-gramming commercial perimeters. Both projects are being conducted in the open source spirit under the GNU Public License, including www sites, FAQs, help forums.
Both VisualFields and OPI R packages are available for download from CRAN. The OPI currently supports a variety of simulation modes, the Octopus 900 perimeter, manufactured by HAAG-STREIT, and the Heidelberg Edge Perimeter (HEP), manufactured by Heidelberg Engineering. Work on both packages is ongoing. An implementation of the OPI for the Octopus 900 is also available for Java.
Using the OPI, novel research can be carried out using two commercially available perime-ters: the Octopus 900 and the HEP. Using commercial machines, rather than custom laboratory hardware as in most psychophysical experiments, has several ben-efits. Firstly, the machines have built in gaze tracking and light calibration, removing the need for auxiliary hardware. Secondly, the design of the machines allow them to be easily used in clinical settings, and they are ergonomic for subjects. Further details can be found at http://perimetry.org/OPI.