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Related Experiment Videos

Incomitant dissociated vertical deviation and superior oblique overaction.

L C McCall1, A L Rosenbaum

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

Ophthalmology
|June 1, 1991
PubMed
Summary

Superior oblique overaction can cause incomitant dissociated vertical deviation, varying with gaze. This pattern, least in adduction and greatest in abduction, guides surgical management for strabismus patients.

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Area of Science:

  • Ophthalmology
  • Strabismus Surgery
  • Pediatric Ophthalmology

Background:

  • Dissociated vertical deviation (DVD) can coexist with superior oblique (SO) overaction.
  • This combination may lead to gaze-dependent variations in DVD, termed incomitance.
  • Esotropia with SO overaction and "A"-pattern strabismus presents a complex challenge.

Purpose of the Study:

  • To describe a specific pattern of incomitant dissociated vertical deviation.
  • To analyze the relationship between SO overaction, esotropia, "A"-pattern, and gaze-dependent DVD.
  • To evaluate surgical outcomes for incomitant DVD.

Main Methods:

  • Case series of seven patients with esotropia, bilateral SO overaction, "A"-pattern, and incomitant DVD.
  • Detailed examination of DVD measurements in different horizontal gaze positions (adduction, primary, abduction).

Related Experiment Videos

  • Surgical intervention using asymmetric superior rectus recessions and partial SO tenotomy in four patients.

    • Main Results:

    • A consistent pattern of incomitant DVD was observed: least in adduction, moderate in primary gaze, and greatest in abduction.
    • Surgical treatment in four patients aimed to address the incomitant DVD.
    • The specific pattern of incomitance was a key feature in all presented cases.

    Conclusions:

    • Incomitant DVD associated with SO overaction and "A"-pattern esotropia exhibits a predictable pattern.
    • Recognizing this specific gaze-dependent DVD is crucial for selecting appropriate surgical strategies.
    • Tailored surgical approaches are necessary for managing complex strabismus with incomitant deviations.