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Related Experiment Videos

The lateral geniculate nucleus in human strabismic amblyopia.

G K von Noorden1, M L Crawford

  • 1Cullen Eye Institute, Baylor College of Medicine, Houston, Texas.

Investigative Ophthalmology & Visual Science
|August 1, 1992
PubMed
Summary

Cell shrinkage in the lateral geniculate nucleus (LGN) was observed in a human with strabismic amblyopia. This finding validates the monkey model for studying amblyopia, showing similar brain changes in humans and monkeys.

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Area of Science:

  • Neuroscience
  • Ophthalmology
  • Developmental Biology

Background:

  • Cell shrinkage in the lateral geniculate nucleus (LGN) is a known consequence of experimental amblyopia in monkeys.
  • Previous studies have linked amblyopia to visual deprivation, anisometropia, and strabismus.

Purpose of the Study:

  • To investigate if similar LGN cell shrinkage occurs in human strabismic amblyopia.
  • To compare brain changes in human strabismic amblyopes with findings from monkey models.

Main Methods:

  • A post-mortem human brain from a strabismic amblyope was analyzed.
  • Cell sizes were compared between LGN layers receiving input from the normal versus the amblyopic eye.

Main Results:

  • Significant cell shrinkage was found in LGN layers connected to the amblyopic eye.

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  • This shrinkage was most pronounced in the ipsilateral LGN.

    • Conclusions:

    • The study provides the first evidence of LGN cell shrinkage in a human strabismic amblyope.
    • These findings support the use of the monkey model for studying strabismic amblyopia in humans.