Evaluating the Consistency of Online Circular Contrast Perimetry Across Different Computer Monitors: A Cross-sectional Study.

Aim and background: The aim of this study is to evaluate the agreement between perimetric findings of a novel 24°, 52-loci online circular contrast perimetry (OCCP) application on three different computer monitors to determine its stability of testing across varying displays.

Materials and methods: Sixty-one participants (19 healthy controls, 42 with glaucoma) underwent SAP testing followed by OCCP testing on three uncalibrated computer monitors in randomized order: a large-screen (24-inch) desktop personal computer (DPC) (Dell, Texas, US), a 17-inch laptop (LPC) (Dell), and a 14-inch MacBook Pro (MP) (Apple, California, US).

Results: Agreement of mean deviation (MD), pattern standard deviation (PSD), and visual field index (VFI)/visual index (VI) values between MP, DPC, and LPC OCCP were strong, with intraclass correlations and Deming's coefficients ranging from 0.96 to 1.00 and 0.93 to 1.03, respectively. When OCCP tests were compared to SAP, ICCs and Deming's coefficients were less strong, ranging from 0.89 to 0.95 and 0.72 to 0.89. Bland-Altman analyses revealed higher biases (2.90 to 3.59 dB) and wider limits of agreement when comparing OCCP to SAP than when comparing OCCP on different monitors. Bland-Altman bias of contrast sensitivities for each 24-2 testing location revealed stronger relationships between OCCP tests on different monitors (-0.82 to 0.78) than between OCCP and SAP tests (-1.53 to 1.32).

Conclusion: OCCP demonstrates strong levels of test-retest agreement when performed on computer monitors of varying display and moderate to strong levels of correlation to SAP perimetric indices.

Clinical significance: With further enhancements, OCCP could potentially be used on different personal computers, which could help address current challenges in glaucoma care, such as limited access to traditional perimetric testing. This has the potential to expand the scope of glaucoma detection and monitoring, particularly in remote and underserved areas of our community.

How to cite this article: Gong A, Busija L, Skalicky SE. Evaluating the Consistency of Online Circular Contrast Perimetry Across Different Computer Monitors: A Cross-sectional Study. J Curr Glaucoma Pract 2025;19(1):15-27.