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[A new ophthalmologic refractometer assisted by a microprocessor].

F Corno, C Ratier, J Simon

    Journal Francais D'Ophtalmologie
    |January 1, 1984
    PubMed
    Summary
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    A novel automated refractometer offers reliable and accurate eye measurements. This objective instrument analyzes ophthalmoscopic images, achieving high concordance with subjective refractions for spherical and cylindrical powers.

    Area of Science:

    • Ophthalmology
    • Optometry
    • Biomedical Engineering

    Background:

    • Accurate refractive error assessment is crucial for vision correction.
    • Traditional subjective refraction requires patient cooperation and examiner skill.
    • Automated objective methods offer potential for increased efficiency and standardization.

    Purpose of the Study:

    • To develop and evaluate a new automated, objective refractometer.
    • To assess the reliability and accuracy of the automated refractometer compared to subjective refraction.

    Main Methods:

    • An automated, objective refractometer was developed using microprocessor-based data analysis of ophthalmoscopic images.
    • The instrument's results (spherical/cylindrical power and cylinder axis) were compared against subjective refraction measurements.

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  • Evaluation focused on the degree of difference between automated and subjective measurements.

    • Main Results:

    • 80-85% of automated refractometer measurements for spherical or cylindrical powers agreed within 0.50 diopters of subjective refraction.
    • For eyes with >= 1.5 diopters of astigmatism, cylinder axis measurements differed by no more than 5 degrees between automated and subjective methods.

    Conclusions:

    • The new automated refractometer demonstrates high reliability and accuracy for objective refractive error assessment.
    • This instrument shows significant potential for clinical use in optometry and ophthalmology.
    • Automated refraction can provide comparable results to subjective methods, enhancing efficiency.