analogue scale: an assessment questionnaire for visual vertigo
The concept of "visual vertigo
" was first described by Erasmus Darwin in 1797 .
(4) Multifocal spectacles can impair distance depth perception, contrast sensitivity, and exacerbate visual vertigo
. (5,6) Bifocal lenses induce an apparent displacement of objects in the visual field due to prismatic jump at the top of the reading segment, altering both normal perception and increasing the risk of falls.
Bronstein AM, 1995, Visual vertigo
syndrome: clinical and posturography findings.
Well established concepts are represented by phobic postural vertigo, space and motion phobia, and visual vertigo
He then talked about phobic postural vertigo, visual vertigo
, panic and anxiety besides convulsions in detail.
: symptom assessment, spatial orientation and postural control.
For not only do the mirrors induce visual vertigo
, but they carry a psychological metaphor as well: Visual experience and philosophical reason are integrated perfectly; existing objects are hidden from view; and what appears visually does not necessarily exist.
Experiments on visual vertigo
conducted at the end of the century are also described.
Not only do readers experience a visual vertigo
reading this passage but we are dizzied by the "murmuring tongues" as the passage seems to erupt from itself through sight to sound and movement.
It can be classified among the primary and secondary somatoform dizziness syndromes, which are also termed visual vertigo
syndrome (Bronstein, 1995) or chronic subjective dizziness (Staab, Ruckenstein, 2007).