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Related Experiment Videos

Adaptation to telescopic spectacles: vestibulo-ocular reflex plasticity.

J L Demer1, F I Porter, J Goldberg

  • 1Jules Stein Eye Institute, University of California, Los Angeles 90024.

Investigative Ophthalmology & Visual Science
|January 1, 1989
PubMed
Summary

Wearing telescopic spectacles during head rotation can significantly increase vestibulo-ocular reflex (VOR) gain in individuals. This adaptation enhances VOR across various frequencies and reduces visual discomfort.

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Area of Science:

  • Neuroscience
  • Ophthalmology
  • Vestibular System

Background:

  • The vestibulo-ocular reflex (VOR) stabilizes vision during head movements.
  • Adaptation of the VOR is crucial for visual stability, especially with optical aids.

Purpose of the Study:

  • To investigate how wearing spectacle magnifiers affects VOR adaptation.
  • To determine the impact of telescopic spectacles on VOR gain and visual symptoms.

Main Methods:

  • Normal subjects underwent sinusoidal head rotation while wearing binocular telescopic spectacles (X2, X4, X6).
  • VOR gain was measured in darkness before and after a 15-minute adaptation period.
  • The effect of occluding the peripheral visual field during adaptation was also assessed.

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Main Results:

  • 47-70% of subjects showed significant VOR gain increases (7-46%) after adaptation with telescopic spectacles.
  • Telescopic spectacle power had minimal effect on VOR gain change, but all powers increased gain more than adaptation without telescopes.
  • Adaptation induced VOR gain changes across a broad frequency spectrum.
  • Occluding the peripheral visual field during adaptation led to greater VOR gain increases.

Conclusions:

  • Brief wear of telescopic spectacles can induce significant VOR gain adaptation in normal subjects.
  • This adaptation improves VOR performance across multiple frequencies and reduces symptoms like oscillopsia and motion discomfort.