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Related Experiment Video

Updated: Dec 14, 2025

Mouse Eye Enucleation for Remote High-throughput Phenotyping
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Relationship between Geography and Refractive Error from the UCLA Preschool Vision Program.

Emily K Tam1, Shiva Mehravaran1, Andrew Young1

  • 1Department of Ophthalmology, Stein Eye Institute, David Geffen School of Medicine at the University of California , Los Angeles, California, USA.

Ophthalmic Epidemiology
|July 17, 2020
PubMed
Summary
This summary is machine-generated.

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Geographic location impacts preschool vision screening outcomes. This study found variations in refractive error prevalence across Los Angeles County districts, highlighting potential environmental influences.

Area of Science:

  • Pediatric Ophthalmology
  • Public Health
  • Epidemiology

Background:

  • Vision impairment is a significant concern in early childhood.
  • Early detection through vision screening programs is crucial for timely intervention.
  • The University of California, Los Angeles Preschool Vision Program (UPVP) offers vital screening services.

Purpose of the Study:

  • To investigate the influence of geographic location on preschool vision screening results.
  • To identify potential geographical disparities in refractive error prevalence among preschoolers in Los Angeles County.

Main Methods:

  • Analysis of screening data from 62,936 children aged 2.5 to 6 years (academic years 2012-2015).
  • Utilized a handheld Nikon Retinomax device for vision screening.
Keywords:
Preschool vision screeningUCLA Mobile Eye ClinicUCLA Preschool Vision Programpediatric ophthalmologyprevention

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  • Defined failure criteria based on spherical and cylindrical refractive error thresholds and inter-ocular differences.

    • Main Results:

    • Higher vision screening failure rates were observed in girls, Latino children, and Spanish-speaking households.
    • Significant geographical variance in screening outcomes was noted across five Los Angeles County Supervisory Districts.
    • District 1 exhibited the highest failure rate, while District 4 had the lowest.

    Conclusions:

    • Preliminary evidence suggests geographic factors may contribute to refractive error development in preschoolers.
    • Findings underscore the need for targeted interventions to address vision impairment disparities.
    • Further research can inform strategies for unmet vision care needs in Los Angeles County.