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Related Experiment Videos

Asymptomatic physiologic hyperdeviation in peripheral gaze.

M L Slavin1, S D Potash, S E Rubin

  • 1Department of Ophthalmology, Long Island Jewish Medical Center, New Hyde Park, NY 11042.

Ophthalmology
|June 1, 1988
PubMed
Summary
This summary is machine-generated.

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Physiologic hyperdeviation (HD) is common in normal individuals during peripheral gaze. This finding, often linked to inferior oblique muscle overaction, can prevent misdiagnosis of neurological conditions.

Area of Science:

  • Ophthalmology
  • Neuro-ophthalmology
  • Strabismus

Background:

  • Asymptomatic hyperdeviation (HD) in peripheral gaze can be mistaken for neurological issues.
  • Potential causes include muscle paresis, restrictive orbital diseases, cranial neuropathy, or skew deviation.

Purpose of the Study:

  • To investigate the prevalence of physiologic HD in normal subjects.
  • To differentiate physiologic HD from pathological causes.

Main Methods:

  • Sixty-one normal subjects were examined using the Maddox rod.
  • HD was assessed in various fields of gaze, including primary gaze and with head tilt.
  • Associated findings like vertical diplopia and V-pattern were documented.

Main Results:

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  • 77% of subjects exhibited HD (≥2 prism diopters) in peripheral gaze.
  • Specific patterns of HD were observed in upgaze, with 47% showing isolated contralateral HD and 32% showing ipsilateral HD.
  • Vertical diplopia was reported by 94% of those with HD, and 85% had a V-pattern.

Conclusions:

  • Physiologic HD is highly prevalent in normal individuals, particularly in peripheral gaze.
  • This finding often mimics inferior oblique muscle overaction.
  • Recognizing this physiologic phenomenon can prevent unnecessary and erroneous neurological diagnoses.