Disparity vergence eye movements exhibit preprogrammed motor control

John L. Semmlow, George K. Hung, Jia Long Horng, Kenneth J. Ciuffreda

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56 Scopus citations


To determine the control strategy used to mediate disparity vergence eye movements, an optical technique was employed which eliminated the visual feedback normally associated with a vergence movement. The resulting "open-loop" vergence responses from four subjects exhibited multiple step-like movements. This finding augments previous demonstrations of multiple-step tracking strategies in vergence eye movements and supports the theory that the initial portion of the vergence response is under preprogrammed control. Additional evidence for preprogramming is given by the similarity of the initial dynamics between open- and closed-loop responses as evidenced by similar ratios of peak velocity to amplitude (i.e. "main sequence" plots).

Original languageEnglish (US)
Pages (from-to)1335-1343
Number of pages9
JournalVision Research
Issue number10
StatePublished - May 1994

All Science Journal Classification (ASJC) codes

  • Ophthalmology
  • Sensory Systems


  • Disparity vergence
  • Motor control
  • Motor preprogramming
  • Vergence eye movements


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