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Related Experiment Videos

Does experimentally-induced amblyopia cause hyperopia in monkeys?

L Kiorpes1, J Wallman

  • 1Center for Neural Science, New York University, NY 10003, USA.

Vision Research
|May 1, 1995
PubMed
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This summary is machine-generated.

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Amblyopia, or lazy eye, may cause hyperopic anisometropia (unequal refractive error) and affect eye growth. This study in monkeys suggests amblyopia can lead to late-onset hyperopia.

Area of Science:

  • Ophthalmology
  • Developmental Biology
  • Neuroscience

Background:

  • Strabismus and unilateral defocus are known visual abnormalities.
  • Refractive errors and amblyopia are common visual impairments.

Purpose of the Study:

  • To investigate the relationship between experimentally induced strabismus/unilateral defocus and refractive errors in monkeys.
  • To determine if amblyopia is associated with hyperopic anisometropia and altered eye growth.

Main Methods:

  • 19 Macaca nemestrina monkeys were raised with experimentally induced strabismus or unilateral defocus.
  • Refractive errors, including hyperopic anisometropia, were assessed.
  • Axial length and vitreous chamber depth were measured.

Main Results:

Related Experiment Videos

  • 10 monkeys developed hyperopic anisometropia.
  • All 10 hyperopic animals were amblyopic, with the more hyperopic eye being the amblyopic one.
  • Refractive changes correlated with axial length and vitreous chamber depth.

Conclusions:

  • Amblyopia may be a cause of hyperopic anisometropia.
  • Early visual abnormalities are associated with later hyperopic anisometropia.
  • Amblyopia might influence eye growth, leading to late-onset hyperopia.