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Subjective Refraction Test Using a Smartphone for Vision Screening
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Two-dimensional peripheral refraction in adults.

Xiaoyun Xi1, Jiangdong Hao1, Zhenghua Lin2

  • 1Aier School of Ophthalmology, Central South University, Changsha, China.

Biomedical Optics Express
|May 19, 2023
PubMed
Summary
This summary is machine-generated.

This study maps peripheral refraction in adults, revealing how defocus varies with central myopia. These findings offer insights for personalized vision correction and myopia control strategies.

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Area of Science:

  • Ophthalmology
  • Optometry
  • Visual Science

Background:

  • Peripheral refraction's role in visual function and myopia control remains unclear due to limited detection methods.
  • Understanding peripheral refraction is crucial for advancing refractive correction and myopia management.

Purpose of the Study:

  • To create a database of 2D peripheral refraction profiles in adults.
  • To investigate how peripheral refraction features correlate with different levels of central refractive error.

Main Methods:

  • Recruited 479 adult subjects for the study.
  • Utilized an open-view Hartmann-Shack scanning wavefront sensor to measure right eyes.
  • Analyzed two-dimensional (2D) relative peripheral refraction maps.

Main Results:

  • Peripheral refraction profiles showed distinct defocus patterns: myopic in hyperopic/emmetropic groups, slight myopic in mild myopic, and hyperopic in other myopic groups.
  • Defocus variations with central refraction differed across retinal regions.
  • Defocus asymmetry between upper and lower retinas (within 16°) intensified with increasing central myopia.

Conclusions:

  • Peripheral defocus patterns vary significantly with central refractive error.
  • Characterizing peripheral defocus variations provides valuable data for individualized vision correction.
  • Findings can inform the design of novel spectacle lenses and contact lenses for myopia control.