Researchers from Wills Eye Hospital compared the performance of the lightweight, head-mounted, portable, virtual reality VisuALL perimeter (Olleyes) to the gold standard Humphrey Field Analyzer (HFA) and found a strong correlation between the 2 in interpreting visual fields in both subjects with normal vision and those with glaucoma.

The prospective, observational study was conducted on 50 eyes of 25 healthy subjects and 52 eyes of 26 patients with a controlled mild or moderate stages of glaucoma. All participants had visual field testing with VisuALL and the HFA (24-2, Swedish interactive threshold algorithm). The mean sensitivity of the whole visual field and each quadrant was compared between both machines; receiver operating characteristic curve analysis was used to compare the diagnostic abilities and the Bland-Altman plot to evaluate the agreement of the 2 perimeters.

The global mean sensitivity of the VisuALL and the HFA correlated significantly in both the normal (r=.5, P=.001) and glaucoma (r=.8, P<.001) groups. The mean sensitivity of all quadrants also correlated significantly in both groups. The VisuALL mean sensitivity had a larger area under the (0.98) receiver operating characteristic curve than the HFA (0.93) mean sensitivity (P=.06) in distinguish normal eyes from glaucoma eyes. The researchers, who reported their findings in the Journal of Glaucoma, concluded that the VisuALL demonstrated high diagnostic performance.