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Related Experiment Videos

Repeated mobility testing for later artificial visual function evaluation.

M Velikay-Parel1, D Ivastinovic, M Koch

  • 1Department of Ophthalmology, Medical University of Graz, Auenbruggerplatz 4, 8036 Graz, Austria. michaela.velikayparel@meduni-graz.at

Journal of Neural Engineering
|February 28, 2007
PubMed
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A new mobility test effectively assesses visual function in visually impaired patients. This tool shows promise for evaluating progress in artificial vision patients.

Area of Science:

  • Ophthalmology
  • Neuroscience
  • Rehabilitation Science

Background:

  • Severe visual impairment impacts daily functioning.
  • Accurate assessment of visual function is crucial for rehabilitation and artificial vision development.

Purpose of the Study:

  • To evaluate a novel mobility test for repeated assessment of visual function in patients with severe visual impairment.
  • To explore its potential application in monitoring functional progress in patients with artificial vision.

Main Methods:

  • Ten subjects with visual acuity (VA) from light perception to 20/200 and reduced visual field (VF) were grouped by VA.
  • Subjects navigated four structurally similar mazes multiple times.
  • Performance was measured by average speed and number of contacts.

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Main Results:

  • Average passing times differed significantly between groups (p = 0.03), correlating with VA and VF.
  • No significant difference was found in the average number of contacts (p = 0.15).
  • The mobility test yielded statistically relevant results for repeated testing.

Conclusions:

  • The designed mobility test is suitable for assessing visual function in patients with severe vision impairment.
  • This test demonstrates potential as a tool for evaluating visual function in patients receiving visual prostheses.