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SVV - Subjective Visual Vertical

SVV - Subjective Visual Vertical

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.
- 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 and D-VNS tests range.


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


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


Windows 10 pro 64 bits

Intel Procesor I5-xxx (3rd generation)
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

Second screen display


Patient manager MAESTRO
Patterns Line, dot line or arrow (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


Additional equipments

- Goggles Flex
- Kit of 3 limited vision eye occluders
- Gamepad
- SVV software

Downloadable documents

Additionnal equipments

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