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Observations on the relationship between anisometropia, amblyopia and strabismus
Earl L Smith1, Li-Fang Hung1, Baskar Arumugam1
1College of Optometry, University of Houston, TX 77204, USA; Brien Holden Vision Institute, Sydney, Australia.
Vision Research
|April 14, 2017
Summary
Early hyperopic anisometropia is a risk factor for amblyopia. However, amblyopia does not impede emmetropization, while strabismus disrupts it, leading to anisometropia and amblyopia.
Area of Science:
- Ophthalmology
- Developmental Biology
- Neuroscience
Background:
- Anisometropia, amblyopia, and strabismus are common visual disorders.
- Understanding their causal relationships is crucial for effective treatment.
Purpose of the Study:
- To investigate if amblyopia or strabismus interfere with emmetropization.
- To determine the role of anisometropia in the development of amblyopia and strabismus.
Main Methods:
- Analysis of non-human primate data with induced monocular form deprivation, anisometropia, amblyopia, and strabismus.
- Interocular comparisons of spatial vision and refractive development.
Main Results:
- Early hyperopic anisometropia dose-dependently induced amblyopia.
- Amblyopia did not interfere with emmetropization; amblyopic eyes could correct refractive errors.
- Early strabismus disrupted emmetropization, causing anisometropia and hyperopia in deviating eyes.
Conclusions:
- Early hyperopic anisometropia is a significant risk factor for amblyopia.
- Early esotropia can trigger anisometropia and amblyopia.
- Amblyopia alone does not significantly risk hyperopia or anisometropia development.