VS+ Overview

  • The VS+ Visually Evoked Potential (VEP) system uses world-leading science developed by the Save Sight Institute at the University of Sydney, producing superior measurement accuracy and repeatability.
  • The system consists of sophisticated but easy to use software controlling a proprietary bio amplifier specifically designed for making both full field and multi-focal VEP recordings.
  • The VS+ System provides objective amplitude and latency responses for up to 56 separate segments of visual field.

VS+ Recording Screen

56 segment multifocal recording screen

Regulatory Status:

  • Application for CE marking has been submitted and audit has been performed.
  • Certification pending the completion of the process by the Notified Body.
  • We will be submitting for regulatory clearance in other key world markets once the CE Certificate has been received.
  • Please check our website for updates on the VS+ regulatory approvals.

sector analysis

Sector Analysis – Customise Sectors

Progression Waveforms

Progression Waveforms

VS+ Features

  • 56 segment multifocal recording with trace improvements and noise scores between runs.
  • Full field recording with fully customizable options: frequency, sequence length, check size, check colors, geometry (half, quarter, inner/outer circle).
  • Four patient focus games with variable difficulty, which are played in the center of the screen and keep the patient fixated with minimal muscle movements.
  • Ability to view recordings, including eye comparison (asymmetry) and modify best channel selection and waveform peak positions.
  • Ability to create or compare to reference sets such as normals patients, including advanced correlation-based latency comparisons (as opposed to simple peak comparisons).
  • Ability to export all data including trace waveforms in native, graphical or .csv format (for analysis in 3rd party packages).
  • Standard electrode wiring interfaces for both mfVEP and ffVEP, as well as a ‘research’ mode for custom wiring. See figure 1.
  • Professional SQL database and crash-recovery features (e.g. ability to directly continue interrupted tests in case of a power outage).
  • Simple on-site setup which can be performed by any local technician.
  • “Stand alone” software that can be installed on any PC for viewing and analyzing recordings without needing physical access to the system.
  • All consumables supplied for instant clinical use.
  • 12 months’ warranty with immediate resolution.

VS+ Optional Extras:

  • On-site installation and comprehensive training by qualified Visionsearch staff.
  • Operator support by phone or online (technical support included in warranty).
  • Extended Warranty.

VS+ Configuration Options

Full Field Configuration Options

VS+ Hardware and Options

  • High performance Laptop (SSD, NVidia graphics).
  • Custom Bio-Amplifier with easy to wire interface and real-time skin impedance indicators next to the electrode sockets. See figure 1.
  • Patient feedback game controller to assist in maintaining focus through simple games in the center of the screen.
  • Medical grade silicone electrode crosses and electrode holders.
  • Head positioning distancer with medical grade silicone patient head rest.
  • Hospital grade isolation transformer.
  • Ophthalmology table with electric height adjustment, patient monitor arm, and lockable wheels for easy relocation.
  • Compact printer.
  • Suitable for 110/220/240 volt, 50-60 Hz power.

Patient Amplifier

Patient Amplifier with mfVEP and ffVEP Interfaces

VS+ "Scientific Edition" includes the following additional analytic and research functions:

  • Sector analysis: group segments into sectors, including via custom groupings.
  • Progression analysis: a powerful tool for analyzing a patient’s progress in amplitude, latency over time, including same channel/same peak logic and signal correlation based latency comparison.  Progression can be viewed based on absolute values, in comparison to a baseline test or in terms of asymmetry between eyes.
  • Reporting: generate custom reports based on templates, including the ability to iterate through sub-data (e.g. tests, segments).
  • Recalculate tool: re-process a recording with non-standard parameters (e.g. noise thresholds, analysis intervals, averaging coefficients) for research purposes.

Progression Difference View

Progression Difference View