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Related Experiment Video

Updated: Jun 21, 2026

Inducement and Evaluation of a Murine Model of Experimental Myopia
07:20

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Published on: January 22, 2019

Relative peripheral hyperopic defocus alters central refractive development in infant monkeys.

Earl L Smith1, Li-Fang Hung, Juan Huang

  • 1College of Optometry, University of Houston, Houston, TX 77204-2020, USA. esmith@uh.edu

Vision Research
|July 28, 2009
PubMed
Summary

Peripheral hyperopia, or farsightedness in the eye's periphery, can drive central myopia (nearsightedness) in primates. This effect occurs even when the fovea, crucial for sharp vision, is removed.

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Area of Science:

  • Ophthalmology
  • Primate vision research
  • Refractive error development

Background:

  • Refractive errors, such as myopia and hyperopia, can vary with eccentricity across the retina.
  • Peripheral refractive errors are increasingly implicated in the development of central refractive errors in humans.

Purpose of the Study:

  • To investigate the impact of peripheral hyperopia on central refractive development in rhesus monkeys.
  • To determine if the fovea is necessary for compensatory myopic changes in response to peripheral optical defocus.

Main Methods:

  • Two distinct rearing strategies were employed in rhesus monkeys.
  • Lens-induced relative peripheral hyperopia was created to optically impose defocus.
  • Foveal ablation using laser photoablation was performed in a subset of subjects.

Main Results:

  • Lens-induced peripheral hyperopia resulted in the development of central axial myopia in intact eyes.
  • Compensatory myopic shifts occurred even after the elimination of the fovea, indicating a non-foveal mechanism.

Conclusions:

  • Peripheral refractive errors significantly influence central refractive development in primates.
  • The primate eye exhibits plasticity, responding to peripheral defocus with central refractive changes independent of the fovea.