title: The Diodewand: a device for tangent screen perimetry.
mesh_terms: D004582:Electronics, Medical / Q000295:instrumentation*; D005069:Evaluation Studies as Topic; D006801:Humans; D008163:Luminescent Measurements; D012607:Scotoma / Q000175:diagnosis; D013997:Time Factors; D058609:Visual Field Tests / Q000295:instrumentation*