Measurement of monocular and binocular visual field defects with a virtual reality head mounted display

Abstract

Purpose : To describe and evaluate a portable visual field (VF) quantification tool for determining monocular and simultaneous binocular VF measurements.

Methods : We used a virtual reality head mounted display (HMD) to quantify VF defects in the central 80 degrees diameter of two groups of patients by applying a fast thresholding strategy with an inverted static stimuli pattern. The first group included 20 patients (30 eyes) with known glaucomatous monocular VF defects. We compared the HMD VF monocular test results with the known full static standard automated perimetric (SAP) values as a reference measurement. In the second group, 20 patients (40 eyes) with binocular neurological and glaucomatous related VF defects, we validated HMD binocular measurements (testing both eyes simultaneously) by comparing the results with the integrated/combined monocular SAP VF tests for both eyes, as a reference test. We determined reproducibility by repeated testing of ten measurements in each group.

Results : The HMD VF measurements were comparable to their corresponding references in each group based on a point by point comparison. Testing points responses in discord with the corresponding SAP thresholds were counted to calculate VF measurement mismatches. These mismatches were 7.08% and 7.38% in the two groups, respectively, calculated as the ratio between the number of mismatched points to the total number of common test points. The HMD VF reliably quantified defects with an intraclass correlation coefficient (ICC) of 0.83 for the first test group and 0.73 for the second binocular test group.

Conclusions : Monocular and binocular HMD VF and SAP VF measurements were comparable in this pilot study.

This is a 2021 ARVO Annual Meeting abstract.

 

Binocular visual field (VF) measurements of two patients compared to monocular Humphrey VF. A) Glaucoma patient: Left and right 24-2 monocular SAP VFs, the integrated VF based on the monocular VFs, and the measured Binocular HMD VF testing (both eyes simultaneously) in the central 24 degrees. B) Craniopharyngioma patient: Left and right 30-2 monocular Humphrey VF, integrated VF, and the measured binocular HMD VF covering the central 30 degrees.