Visual field defects The visual field is everything a person can see when fixating on a point in space.
Conditions
Interventions
Performing the Esterman visual field test on a CE-certified VR perimeter (Oculera VFA).
Sponsors
Universitair Medisch Centrum Groningen
Eligibility
Age
18 Years to 99 Years
Inclusion criteria
Inclusion criteria: Age = 18 years.Ability to understand instructions and complete the test correctly.For patients: clinically confirmed binocular peripheral VF defect (in visual rehabilitation).For healthy participants: no known ocular or neurological conditions (glasses or cataract surgery are not exclusion criteria, assessed with a questionnaire, F1a).
Exclusion criteria
Exclusion criteria: Severe cognitive, motor, or language impairments that prevent correct test execution.Visual acuity worse than 0.3 logMAR (corrected).Medical contraindications to the use of a VR-based device (e.g. epilepsy).For controls, an abnormal Esterman test result on repeated testing with the gold standard (Octopus).
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Healthy participants: the proportion of false-positive outcomes (detection of visual field defects where none is present according to the reference standard).Patients with known VF defects: the proportion of false-negative outcomes (failure to detect existing visual field defects) | — |
Secondary
| Measure | Time frame |
|---|---|
| the spatial agreement of VF defect locations for the VR perimeter compared with the bowl-shaped perimeter, expressed using the Dice score (the Dice score is the proportion of visual field loss that is correctly matched in location relative to the total amount of loss).User-friendliness of each device, assessed via a custom-designed questionnaire (F1b), after completion of each test.Test completeness of the VR-based perimeter device: number of incomplete or technically failed assessments.Executability: number of participants unable to complete the VR-perimetry test. | — |
Countries
Netherlands
Contacts
Public ContactJ. Koopman
Koninklijke Visio
Outcome results
None listed