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Related Experiment Video

Updated: Jun 29, 2025

Subjective Refraction Test Using a Smartphone for Vision Screening
05:36

Subjective Refraction Test Using a Smartphone for Vision Screening

Published on: October 18, 2024

670

Using Smartphones to Enhance Vision Screening in Rural Areas: Pilot Study.

Zheng Wang1, John Kempen2,3,4,5, Gang Luo2

  • 1School of Medicine, Jiaxing University, Jiaxing, China.

JMIR Formative Research
|April 4, 2024
PubMed
Summary

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This summary is machine-generated.

Smartphone apps show promise for vision screening in underserved rural areas, identifying refractive errors and strabismus in children. This technology could improve early detection of amblyopia risk factors and myopia control.

Area of Science:

  • Ophthalmology
  • Public Health
  • Mobile Health Technology

Background:

  • Uncorrected refractive error is the leading cause of visual impairment globally.
  • Amblyopia, often caused by refractive error or ocular misalignment, affects approximately 4% of the population.
  • Limited resources hinder effective mass vision screening in many rural regions.

Purpose of the Study:

  • To pilot-test the feasibility of using smartphone applications for vision screening in areas with limited access to eye care.
  • To assess the utility of mobile technology in identifying visual acuity deficits, refractive errors, and heterophoria.

Main Methods:

  • A vision screening was conducted at a rural summer camp in Sichuan, China, involving 73 fourth and fifth graders.
  • Participants underwent visual acuity testing with a standard eye chart.
Keywords:
appapplicationapplicationsappseyeeyesfeasibilitymHealthmobile healthophthalmologyoptometryrefractive errorscreeningsmartphonestrabismusvisionvision screeningvisualvisual acuity

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  • Refractive error and heterophoria were assessed using two specialized smartphone apps by nonprofessional personnel.

    • Main Results:

    • 6.8% of students had visual acuity worse than 20/20 in at least one eye.
    • Smartphone apps identified refractive errors in 3 students and manifest strabismus (esotropia and exotropia) in 2 students.
    • Median phoria measurements indicated minimal deviation among students without manifest strabismus.

    Conclusions:

    • Smartphone apps are a promising tool for mass vision screening, particularly in resource-limited settings.
    • This technology can aid in identifying risk factors for amblyopia and support myopia control efforts.
    • Mobile vision screening holds significant potential for advancing low-cost eye care in remote areas.