Accuracy and Reproducibility of Virtual Reality Perimetry in Children

Area of Science:

• Ophthalmology
• Visual Science
• Pediatric Optometry

Background:

• Automated static perimetry is crucial for assessing visual field integrity.
• Portable, virtual reality-based perimetry offers potential for accessible visual field testing, particularly in pediatric populations.

Purpose of the Study:

• Determine normal threshold values for the VisuALL-K (Olleyes, Inc) 24-2 program in children.
• Evaluate the retest variability of this virtual reality perimeter using an updated algorithm.

Main Methods:

• A prospective cohort study involved 19 healthy children (aged 8-17 years).
• Participants underwent two 24-2 automated perimetry tests using the VisuALL-K virtual reality perimeter.
• Data analysis included Bland-Altman analysis and intraclass correlation coefficient (ICC) for retest variability.

Main Results:

• Mean threshold values were 30.5 ± 4.0 dB (test 1) and 31.3 ± 2.8 dB (test 2).
• Sensitivity decreased with eccentricity (-0.17 dB/degree).
• Repeatability coefficient was ±5.1 dB for mean deviation, with a learning effect observed; ICC for mean deviation was 0.70 (P < .0001).

Conclusions:

• The VisuALL-K virtual reality perimeter can assess visual fields in children aged 8-17.
• A learning effect was observed, contributing to a wider repeatability difference compared to other head-mounted display perimeters.