Tool
Comparison tool
Side-by-side comparison of DVA signature patterns across the eleven canonical presets — normal, the eight disease chapters, presbyvestibulopathy, and the post-rehabilitation BVP pattern. Pick two signatures, choose a view mode, and the figure plus the matched DvaSignatureCard details render below.
View
Signature A
Bilateral vestibulopathy — established
Bilateral vestibulopathy — established
- DVA loss
- Severe symmetric 0.45-0.50 logMAR in all directions
- Laterality
- Bilateral symmetric
- Asymmetry
- None
- Corroborating tests
- vHIT gain < 0.6 bilaterally · caloric sum < 6 °/s per side · normal SVV · variable VEMPs
Key signature: The BVP fingerprint: symmetric severe DVA loss without directional asymmetry. Cause follows — ototoxicity, idiopathic, post-meningitis, CANVAS — but the DVA pattern is the same.
Signature B
Acute right vestibular neuritis (superior division)
Acute right vestibular neuritis (superior division)
- DVA loss
- Marked asymmetric loss — 0.45 logMAR rightward, near-normal leftward
- Laterality
- Right
- Asymmetry
- Highly asymmetric — diagnostic of unilateral peripheral disease
- Corroborating tests
- vHIT gain reduced on right horizontal canal · oVEMP reduced left · cVEMP preserved · hearing normal
Key signature: The canonical fingerprint of acute unilateral peripheral disease: directional DVA asymmetry where head motion toward the affected side probes the impaired canal.