This study evaluated an updated testing algorithm to determine its dynamic range, and to assess if this produced a suitable central hill of vision, and to evaluate test-retest reproducibility in healthy children. This was a prospective study of children with mean age of 12.7 ±2.5 years (53% male). Mean threshold sensitivity was 30.5 ±4dB for test 1 and 31.3 ±2.8dB for test 2. Test 1 was a 24-2 threshold test on the VisuALL virtual reality system. Test 2 was a retest after a few minutes interval. Central test locations had greater sensitivity than the periphery and a ceiling effect was found for 15% at 35dB level. The location mean threshold had a significant linear correlation for both tests. Completion time was 5.21 ±1.6 minutes for test 1 and 4.60 ±0.97 for test 2 showing a learning effect. For this revised version of virtual reality assessment, the study found a more robust central hill of vision with a higher median threshold sensitivity at central points. Negatives of testing included a small ceiling effect, learning effects and wider reproducibility differences.
Re-evaluation of virtual reality visual field testing
Reviewed by Fiona Rowe
Accuracy and reproducibility of virtual reality perimetry in children.
CONTRIBUTOR
Fiona Rowe (Prof)
Institute of Population Health, University of Liverpool, UK.
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