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Subjective Visual Vertical - SVV (system or VNG option)

Subjective Visual Vertical - SVV (system or VNG option)

The SVV Synapsys enables to test a patient's capacity to perceive verticality and horizontality

- The SVV can be used with different Synapsys equipments like the VNG Ulmer or the D-VNS.
- The SVV can also be used independently.
- It is a fast and simple test that needs little equipment.


The SVV software calculates the deviation angle between the real vertical angle value and the patient’s perception. This simple and fast test completes the VNG tests range.


- Remote control
- GamePad


It can be used on Windows PC, TV screen, video projector or video monitor depending on what equipment it will be used with.


Class IIa medical device (European medical device directive 93/42/EEC)


FDA approved
EC conformity / EN 60601-1 / EN 60601-1-2 / IEC 62471-1


- Goggles Flex
- Disposable foams for goggles
- Limited vision eye occluder


Intel Procesor I5-xxx (3rd generation)
300 Gb of free space on hard disk
4 Gb RAM
Graphic card with dedicated memory - NVIDIA or AMD RADEON type (minimum 2 video output to enable extended mode (dual view))
1 USB port available


Patient manager Saved on a dedicated database or integrated to VNG patient manager
Patterns Line, dot line or triangle (anti-aliasing)
Backgrounds Choice of color, picture, predefined patterns (x6)
Stimulation speed (optokinetic) +20°/s, -20°/s, +40°/s, -40)/s
Available tests Subjective Visual Vertical Subjective Visual Horizontal Dynamic visual vertical and horizontal (optokinetic background)
Protocols parameters Vision : monocular or bi-ocular Patterns zoom Head orientation Pattern choice Multiple choice of disturbing backgrounds (fixed or dynamic) Direction : horizontal or vertical
Results Visualization, comparison, printing
Vision field 20°
Weight 50g (1.8lb)


Additional equipments

- Goggles Flex
- Kit of 3 limited vision eye occluders
- Remote control or gamepad
- SVV software

Downloadable documents

Additionnal equipments

NystaLab (system) Synapsys

NystaLab (system)

See more
Nystagview / E-scope (systems) Synapsys

Nystagview / E-scope (systems)

See more
VNG Ulmer (system) Synapsys

VNG Ulmer (system)

See more
D-VNS (system) Synapsys

D-VNS (system)

See more