Feasibility of Visual Field Testing With a Virtual Reality Headset

Study Overview
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Brief Summary
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This study aim to determine the feasibility of using a virtual reality (VR) headset (HTC Vive) to test the visual field. The VR headset test will be compared to a conventional visual field test, using the Humphrey Field Analyzer. The investigators will include 10 healthy patients without visual field defect, 10 patients with early glaucomatous visual field defect, and 10 patients with advanced visual field defect. Each patient will perform the conventional test twice and the VR headset test 4 times, divided in 3 visits within a 2 month period. The results of the tests (sensitivity thresholds) will be compared. The investigators hypothesize that the results of the conventional and VR tests will be similar.

Official Title
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Feasibility of Visual Field Testing With a Virtual Reality Headset

Conditions
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Glaucoma

Intervention / Treatment
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* Diagnostic Test: Visual Field Testing


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Previous visual field test with Humphrey Field Analyzer indicating normal field, early glaucomatous field damage, or advanced glaucomatous field damage, according to Canadian Glaucoma Society Guidelines. Ability to understand and consent to the study. Exclusion Criteria: Presence of non-glaucomatous pathology that could influence the visual field test, such as media opacities. Previous intraocular surgery less than 6 months from inclusion. Difficulty to execute a reliable visual field test. Potential contra-indications to use of virtual reality headset, including: anxiety disorder, pregnancy, seizure disorder, cardiac pacemaker or other implantable device, severe vertigo or balance disturbance.

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Device Feasibility
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Single Arm<br>Patients will perform visual field testing with the Humphrey Field Analyzer and with the Virtual Reality Headset | Diagnostic Test: Visual Field Testing<br>* Visual field test using the protocol 24-2 Threshold Test<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Visual field differential light sensitivity threshold | Comparison of differential light sensitivity threshold estimated with the Humphrey Field Analyzer and the Virtual Reality headset | Three weeks | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Reproducibility of sensitivity values | Comparison of the reproducibility of sensitivity values estimated with the Humphrey Field Analyzer and the Virtual Reality headset | Three weeks |