Motorische und sensorische antworten bei fusion vertikaler disparitaten in verschiedenen konvergenzstellungen

Translated title of the contribution: Motor and sensory responses in fusion of vertical disparities in different convergence places

Heimo Steffen, Naoto Hara, Dale C. Roberts, David S. Zee

Research output: Contribution to journalArticle

Abstract

To study motor and sensory responses in vertical fusion at different angles of horizontal vergence in normal humans. Methods: The study included 12 normal subjects. A cross (+) extending 3.4 x 3.2°was presented dichoptically. Vertical disparity was introduced by changing the vertical position of the cross in front of one eye. The disparity was incremented by 0.08° every 8 s. Distance viewing was tested with 1 °of convergence demand, near vision with 6-15°convergence demand. Eye movements were recorded using three-axis search coils. Results: Vertical fusion capability was larger at near vision than at distance in 9 of 12 subjects. For the entire group, total vertical fusion capability (motor plus sensory response) differed between distance (mean 1.68°) and near (mean 2.39°). The motor component differed significantly between distance (mean 1.42°) and near (mean 2.13°). No difference in the sensory component was seen between distance (mean 0.26°) and near (mean 0.27°). Conclusions: Vertical fusion capability increases with convergences. This increase is mainly due to an increase of the motor response.

Translated title of the contributionMotor and sensory responses in fusion of vertical disparities in different convergence places
Original languageGerman
Pages (from-to)17-21
Number of pages5
JournalOphthalmologe
Volume97
Issue number1
DOIs
StatePublished - Jan 1 2000

Keywords

  • Convergence
  • Vertical fusion

ASJC Scopus subject areas

  • Ophthalmology

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