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Related Experiment Videos

How reliable is the Goldmann tonometer as a standard?

B Grolman, K J Myers, P Lalle

    Journal of the American Optometric Association
    |November 1, 1990
    PubMed
    Summary
    This summary is machine-generated.

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    The XPERT NCT non-contact tonometer is highly accurate and reliable. Goldmann applanation tonometry (GAT) accuracy depends heavily on operator skill, highlighting the need for standardized protocols in clinical studies.

    Area of Science:

    • Ophthalmology
    • Medical Devices
    • Clinical Measurement

    Background:

    • Goldmann applanation tonometry (GAT) is a standard method for intraocular pressure measurement.
    • Previous studies have established GAT's clinical utility, but its reliability can be operator-dependent.

    Purpose of the Study:

    • To clinically compare the accuracy and reliability of the XPERT NCT non-contact tonometer against Goldmann applanation tonometry (GAT).
    • To evaluate the influence of operator technique on GAT measurements in a controlled clinical setting.

    Main Methods:

    • A clinical comparison involving 620 eyes, with 400 eyes measured by five clinicians using both XPERT NCT and GAT.
    • Utilized four calibrated GAT reference tonometers and multiple GAT operators to assess performance indices.
    • XPERT NCT measurements were analyzed for operator influence, with performance differences attributed to GAT operator technique.

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    Main Results:

    • The XPERT NCT demonstrated high accuracy and reliability in intraocular pressure measurement.
    • Significant variations in GAT performance were observed among different operators.
    • Findings suggest that GAT's accuracy and reliability are contingent upon individual operator technique and experience.

    Conclusions:

    • The XPERT NCT is a dependable instrument for intraocular pressure measurement.
    • Operator variability significantly impacts GAT accuracy, underscoring the need for standardized protocols.
    • The study recommends applying specific protocol safeguards when using GAT as a reference in clinical comparisons to ensure data integrity.