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Updated: Aug 23, 2025

Gaze in Action: Head-mounted Eye Tracking of Children's Dynamic Visual Attention During Naturalistic Behavior
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Modelling ready-made spectacle coverage for children and adults using a large global database.

Ving Fai Chan1, David M Wright1, Sonia Mavi1

  • 1Centre for Public Health, Queen's University Belfast, Belfast, UK.

The British Journal of Ophthalmology
|October 31, 2022
PubMed
Summary
This summary is machine-generated.

Ready-made spectacles (RMS) offer limited coverage for children and adults needing vision correction, especially those with astigmatism. New tools can help estimate RMS suitability for specific populations.

Keywords:
EpidemiologyOptics and RefractionPublic healthVision

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Area of Science:

  • Ophthalmology
  • Optometry
  • Public Health

Background:

  • Ready-made spectacles (RMS) and interchangeable-lens ready-made spectacles (IRMS) are cost-effective vision correction options.
  • Assessing their suitability against current prescribing guidelines is crucial for global accessibility.

Purpose of the Study:

  • To model the suitability of RMS and IRMS for children and adults based on prescribing guidelines.
  • To develop a web-based application for exploring spectacle coverage data.

Main Methods:

  • Analysis of a large global dataset (over 130,000 prescriptions) from OneSight clinics (2016-2019).
  • Modeling RMS and IRMS suitability compared to custom-made spectacles using refractive power and interpupillary distance data.
  • Inclusion of adult (distance, presbyopic) and pediatric prescriptions across 27 countries.

Main Results:

  • Global distance correction coverage with RMS was 58.7%-63.9% for adults and 51.8% for children.
  • Presbyopic adult coverage with RMS was 44.1%-60.9%.
  • Astigmatism was the primary reason for ineligibility, accounting for 27-31% of cases.

Conclusions:

  • RMS and IRMS offer limited coverage under current guidelines, particularly for pediatric and presbyopic populations.
  • Interchangeable designs show minimal improvement in overall coverage.
  • A free web application is available to estimate RMS coverage for targeted groups.