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Published on: September 16, 2025
Peripheral refraction and the development of refractive error: a review
W Neil Charman1, Hema Radhakrishnan
1Faculty of Life Sciences, University of Manchester, Manchester M60 1QD, UK.
Summary
Eyes with hyperopic peripheral refractive errors may have a higher risk of developing myopia. Animal studies show peripheral hyperopia can induce myopia, suggesting retinal control with higher visual system refinement.
Area of Science:
- Ophthalmology
- Vision Science
- Refractive Error Development
Background:
- Emmetropization is the process by which the eye achieves clear vision.
- Peripheral refractive error, specifically relative peripheral hyperopia, is hypothesized to influence axial eye growth and myopia development.
- Understanding the interplay between central and peripheral focus is crucial for myopia research.
Purpose of the Study:
- To review animal and human evidence supporting the hypothesis that relative peripheral hyperopia increases myopia risk.
- To investigate the role of the retina and higher visual centers in emmetropization and refractive development.
- To examine human studies on depth-of-focus and peripheral accommodation in relation to refractive error.
Main Methods:
- Review of animal studies (rhesus monkeys) demonstrating emmetropization with foveal ablation and induced peripheral hyperopia.
- Analysis of evidence for retinal control versus higher visual system involvement in emmetropization.
- Examination of human studies on visual field depth-of-focus and peripheral accommodation responses.
Main Results:
- Animal models show peripheral hyperopia can induce central myopia.
- Emmetropization appears primarily retinal but refined by higher visual centers.
- Human studies indicate peripheral visual stimuli influence accommodation, though peripheral resolution is less focus-sensitive than detection.
Conclusions:
- The hypothesis that relative peripheral hyperopia drives human myopia remains unproven.
- Available data suggest a potential interaction between axial and peripheral focus states in refractive development.
- Further human studies are needed to confirm the role of peripheral optics in myopia etiology.
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