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Related Experiment Videos

A visual evoked response simulator.

J Dudson1, G Wynn-Williams

  • 1Department of Physics, University of Otago, Dunedin, New Zealand.

Australasian Physical & Engineering Sciences in Medicine
|June 1, 1992
PubMed
Summary
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A new Visual Evoked Response (VER) simulator, VERSIM, aids calibration and quality assurance for ophthalmic electrophysiology instruments. This battery-powered device accurately replicates normal VER waveforms using a microprocessor and digital signal processing.

Area of Science:

  • Ophthalmic electrophysiology
  • Biomedical instrumentation
  • Neuroscience

Background:

  • Accurate calibration and quality assurance are crucial for ophthalmic electrophysiological instrumentation.
  • Existing methods for testing these instruments may have limitations in simulating realistic physiological responses.

Purpose of the Study:

  • To design and develop a novel Visual Evoked Response (VER) phantom, named VERSIM.
  • To provide a reliable tool for the calibration and quality assurance of ophthalmic electrophysiological equipment.

Main Methods:

  • The VERSIM utilizes a microprocessor with a stored digitized VER waveform.
  • Waveform output is achieved through conversion to an analog signal.
  • Frequency control is managed via software delays, and voltage range is set by a voltage divider network.

Related Experiment Videos

  • The device is battery-powered for subject isolation from mains electricity.

    • Main Results:

    • A functional VER phantom (VERSIM) was successfully designed and implemented.
    • The device simulates a normal VER waveform response.
    • VERSIM facilitates consistent and reliable testing of ophthalmic electrophysiological instruments.

    Conclusions:

    • The VERSIM offers a valuable solution for the calibration and quality assurance of ophthalmic electrophysiological instrumentation.
    • This simulator enhances the accuracy and dependability of diagnostic tools in ophthalmology.
    • The microprocessor-based design ensures a reproducible and controllable simulation of VERs.