Implementation of the Open Perimetry Interface (OPI) for simulating and controlling visual field machines using R. The OPI is a standard for interfacing with visual field testing machines (perimeters) first started as an open source project with support of Haag-Streit in 2010. It specifies basic functions that allow many visual field tests to be constructed. As of February 2022 it is fully implemented on the Haag-Streit Octopus 900 and 'CrewT ImoVifa' ('Topcon Tempo') with partial implementations on the Centervue Compass, Kowa AP 7000 and Android phones. It also has a cousin: the R package 'visualFields', which has tools for analysing and manipulating visual field data.
| Version: | 3.0.5 | 
| Imports: | jsonlite, Rfast, abind, openssl | 
| Suggests: | testthat (≥ 3.0.0) | 
| Published: | 2025-10-14 | 
| DOI: | 10.32614/CRAN.package.OPI | 
| Author: | Andrew Turpin [cre, aut, cph] (ORCID: 0000-0003-2559-8769), David Lawson [ctb, cph], Ivan Marin-Franch [ctb, cph], Matthias Muller [ctb], Jonathan Denniss [ctb, cph], Astrid Zeman [ctb], Giovanni Montesano [ctb] | 
| Maintainer: | Andrew Turpin <andrew.turpin at lei.org.au> | 
| License: | Apache License (≥ 2) | 
| URL: | https://opi.lei.org.au/ | 
| NeedsCompilation: | no | 
| Materials: | README, NEWS | 
| CRAN checks: | OPI results | 
| Reference manual: | OPI.html , OPI.pdf | 
| Package source: | OPI_3.0.5.tar.gz | 
| Windows binaries: | r-devel: OPI_3.0.5.zip, r-release: OPI_3.0.5.zip, r-oldrel: OPI_3.0.5.zip | 
| macOS binaries: | r-release (arm64): OPI_3.0.5.tgz, r-oldrel (arm64): OPI_3.0.5.tgz, r-release (x86_64): OPI_3.0.5.tgz, r-oldrel (x86_64): OPI_3.0.5.tgz | 
| Old sources: | OPI archive | 
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