Regulation of static and dynamic ocular alignment in patients with trochlear nerve pareses

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Abstract

Ocular alignment and saccades were studied in seven patients with trochlear nerve pareses, before and after strabismus surgery. Prior to surgery, a position-dependent vertical ocular misalignment was present, and downward saccades were hypometric in the paretic eye. Strabismus surgery reduced the magnitude and position-dependence of the static misalignment. Saccade conjugacy improved in the patients with congenital pareses, and in the patient with a gradual-onset acquired paresis, but less improvement occurred in subjects with traumatic pareses. The post-operative change in saccade conjugacy relative to the change in static alignment correlated with pre-operative vertical vergence, suggesting that changes in saccade yoking depend on an interaction between saccades and vertical vergence.

Original languageEnglish (US)
Pages (from-to)3255-3264
Number of pages10
JournalVision Research
Volume35
Issue number23-24
DOIs
StatePublished - Dec 1995

Keywords

  • Adaptation
  • Eye movements
  • Human
  • Strabismus
  • Superior oblique

ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems

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