Testing Visual Functions in Patients with Visual Prostheses

  • Robert Wilke
  • Michael Bach
  • Barbara Wilhelm
  • Wilhelm Durst
  • Susanne Trauzettel-Klosinski
  • Eberhart Zrenner
Part of the Biological and Medical Physics, Biomedical Engineering book series (BIOMEDICAL)


A number of different technical devices for restoring vision in blind patients have been proposed to date. They employ different strategies for the acquisition of optical information, image processing, and electrical stimulation. Devices with external cameras or with integrated components for light detection have been developed and are designed to stimulate such different sites as the retina, optic nerve, and cortex. First clinical trials for these devices are being planned or already underway. As vision with these artificial vision devices (AVDs) may differ considerably from natural vision and as it may not be possible to predict visual functions provided by such devices on the basis of technical specifications alone, novel test strategies are needed to comprehensively describe visual performance. We propose a battery of tests for standardized well-controlled investigations in these patients that allow for objective assessment of efficacy of these devices.


Visual Acuity Spatial Frequency Visual Function Visual Performance Brief Symptom Inventory 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Robert Wilke
    • 1
  • Michael Bach
    • 2
  • Barbara Wilhelm
    • 3
  • Wilhelm Durst
    • 1
  • Susanne Trauzettel-Klosinski
    • 1
  • Eberhart Zrenner
    • 1
  1. 1.University Eye Hospital TübingenGermany
  2. 2.University Eye Hospital FreiburgGermany
  3. 3.Steinbeis Transfer Center for Biomedical Optics OfterdingenGermany

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