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Updated: May 16, 2025

Subjective Refraction Test Using a Smartphone for Vision Screening
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Comparison of Self-Test Refraction, Autorefraction, and Subjective Refraction.

Abraão Ferreira de Sousa Neto Kós1, Bernardo Kaplan Moscovici2,3, Cesar Vilar1

  • 1Hospital Oftalmologico de Brasília - HOB, Brasilia, Brasilia, Brazil.

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PubMed
Summary
This summary is machine-generated.

The EyeQue Vision Check 2 self-refraction device shows potential for vision screenings but has limitations in accurately measuring astigmatism and axis compared to traditional methods. Subjective refraction remains essential for precise correction.

Keywords:
autorefractionpower vector analysisself-refractionsubjective refractionteleophthalmology

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Area of Science:

  • Ophthalmology
  • Optometry
  • Vision Science

Background:

  • Accurate refractive error measurement is crucial for vision correction.
  • Self-refraction devices offer potential for accessible vision screening.
  • Comparing novel self-refraction technology with established methods is essential for validation.

Purpose of the Study:

  • To evaluate the performance of the EyeQue Vision Check 2 self-refraction device.
  • To compare its accuracy against autorefraction (OPD-Scan III) and subjective cycloplegic refraction.
  • To assess the agreement between these methods in measuring refractive errors.

Main Methods:

  • A descriptive study involving 80 eyes from 40 patients.
  • Measurements obtained using the EyeQue device, OPD-Scan III, and subjective cycloplegic refraction.
  • Analysis of spherical equivalent, cylindrical power, and axis using power vector decomposition (M, J0, J45).

Main Results:

  • The EyeQue device demonstrated lower variability in spherical measurements but lower precision for astigmatism and axis compared to subjective refraction.
  • Power vector analysis indicated EyeQue overestimated spherical equivalent (M) and altered cylindrical correction (higher J0).
  • While comparable to OPD-Scan for sphere, EyeQue showed inconsistencies in astigmatism correction (J45).

Conclusions:

  • The EyeQue device is a promising, affordable, and portable tool for large-scale vision screenings.
  • Limitations in astigmatism and axis measurements necessitate that subjective refraction complements, rather than replaces, self-refraction.
  • Further research and validation in diverse populations are recommended for the EyeQue device.