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Evaluation of a New Algorithm-Based Approach in Subjective Refraction.

Imene Salah-Mabed1, Vincent Péan1, Damien Gatinel1

  • 1Department of Anterior Segment and Refractive Surgery, Rothschild Foundation, Paris, France.

Journal of Ophthalmology
|May 18, 2026
PubMed
Summary
This summary is machine-generated.

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The SiviewExam Expert system provides accurate subjective refractions comparable to expert manual methods. This algorithm-based approach shows no significant differences in refractive error measurements across a large patient population.

Area of Science:

  • Ophthalmology
  • Optometry
  • Medical Technology

Background:

  • Subjective refraction is crucial for determining precise optical correction.
  • Traditional manual refraction relies on expert skill and can have inter-examiner variability.
  • New algorithm-based systems aim to standardize and improve the accuracy of subjective refraction.

Purpose of the Study:

  • To evaluate a novel algorithm-based subjective refraction system, SiviewExam Expert.
  • To compare its refractive outcomes against those of a professional expert using a standardized manual method.
  • To assess the system's performance on a large and diverse patient population.

Main Methods:

  • Prospective comparison of two subjective refraction methods: manual expert refraction and the SiviewExam Expert system.

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  • Inclusion of 107 patients with a wide range of refractive errors (mean SE -2.10 ± 3.37 D).
  • Analysis of outcomes using power vector analysis (M, J0, J45) and comparison of limits of agreement with established inter-examiner variability.

    • Main Results:

    • No statistically significant bias was observed between the SiviewExam Expert system and expert manual refraction for M, J0, and J45 components.
    • The limits of agreement for M, J45, and J0 were significantly lower than the expected inter-examiner variability (0.7 D).
    • The SiviewExam Expert system's generated report was deemed accurate by the expert in 100% of cases.

    Conclusions:

    • The SiviewExam Expert system demonstrates comparable clinical accuracy to expert manual subjective refraction.
    • The algorithm-based approach offers a reliable method for subjective refraction across a broad spectrum of ametropias.
    • This technology has the potential to standardize and enhance the efficiency of refractive error assessment.