» Articles » PMID: 38899952

Repeatability of a Virtual Reality Headset Perimeter in Glaucoma and Ocular Hypertensive Patients

Abstract

Purpose: The VisuALL S is an automated, static threshold, virtual reality-based perimeter for mobile evaluation of the visual field. We examined same-day and 3-month repeatability.

Methods: Adult participants with a diagnosis of glaucoma or ocular hypertension underwent two VisuALL 24-2 Normal T- Full threshold strategy tests at baseline and one additional exam at 3 months for each eligible eye. Spearman, intraclass correlation coefficients (ICCs), and Bland-Altman plots were used to assess the correlation of individual point sensitivities and mean deviation (MD) among three tests.

Results: Eighty-eight eyes (44 participants) were included. Average age was 68.1 ± 14.3 years, and 60.7% were male. VisuALL MD was highly correlated between tests (intravisit: r = 0.89, intervisit: r = 0.82; P < 0.001 for both). Bland-Altman analysis showed an average difference in intravisit MD of -0.67 dB (95% confidence interval [CI], -6.04 to 4.71 dB) and -0.15 dB (95% CI, -8.04 to 7.73 dB) for intervisit exams. Eight-five percent of pointwise intravisit ICCs were above 0.75 (range, 0.63 to 0.93), and 65% of pointwise intervisit ICCs were above 0.75 (range, 0.55 to 0.91).

Conclusions: VisuALL demonstrated high correlation of MD between tests and good repeatability for individual point sensitivities among three tests in 3 months, except at the points around the blind spot and superiorly.

Translational Relevance: The preliminary reproducibility results for VisuALL are encouraging. Its portable design makes it a potentially useful tool for patients with glaucoma, enabling more frequent assessments both at home and in clinical settings.

References
1.
Elze T, Pasquale L, Shen L, Chen T, Wiggs J, Bex P . Patterns of functional vision loss in glaucoma determined with archetypal analysis. J R Soc Interface. 2014; 12(103). PMC: 4305414. DOI: 10.1098/rsif.2014.1118. View

2.
Koo T, Li M . A Guideline of Selecting and Reporting Intraclass Correlation Coefficients for Reliability Research. J Chiropr Med. 2016; 15(2):155-63. PMC: 4913118. DOI: 10.1016/j.jcm.2016.02.012. View

3.
Gardiner S . Differences in the Relation Between Perimetric Sensitivity and Variability Between Locations Across the Visual Field. Invest Ophthalmol Vis Sci. 2018; 59(8):3667-3674. PMC: 6054428. DOI: 10.1167/iovs.18-24303. View

4.
Haefliger I, Flammer J . Increase of the short-term fluctuation of the differential light threshold around a physiologic scotoma. Am J Ophthalmol. 1989; 107(4):417-20. DOI: 10.1016/0002-9394(89)90667-3. View

5.
Artes P, Iwase A, Ohno Y, Kitazawa Y, Chauhan B . Properties of perimetric threshold estimates from Full Threshold, SITA Standard, and SITA Fast strategies. Invest Ophthalmol Vis Sci. 2002; 43(8):2654-9. View