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Related Experiment Videos

A modified Schirmer test: the fine-thread method for measuring lacrimation.

K Kurihashi, N Yanagihara, Y Honda

    Journal of Pediatric Ophthalmology
    |November 1, 1977
    PubMed
    Summary
    This summary is machine-generated.

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    A novel cotton thread method offers a faster and gentler alternative for measuring tear production, improving upon the traditional Schirmer test for diagnosing lacrimal deficiency.

    Area of Science:

    • Ophthalmology
    • Diagnostic Methods

    Background:

    • The Schirmer test is a standard method for assessing tear production.
    • Conventional Schirmer testing utilizes filter paper, which can be time-consuming and potentially irritating.

    Purpose of the Study:

    • To introduce and evaluate a modified Schirmer test using fine cotton thread.
    • To compare the efficacy and patient comfort of the new thread method against the traditional filter paper method.

    Main Methods:

    • A fine cotton thread, stained with fluorescein, is inserted into the conjunctival sac for 5-30 seconds.
    • The soaked portion of the thread is measured in millimeters, with comparisons made between both eyes.
    • Multiple consecutive measurements are taken to account for natural tear variability.

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    Main Results:

    • The cotton thread method is significantly faster (5-30 seconds vs. 5 minutes).
    • It is less injurious to the eye and provides a more stable measurement.
    • The method allows for simultaneous fluorescein dye disappearance/dilution tests and is suitable for children.

    Conclusions:

    • The fine cotton thread method is a superior alternative to the conventional Schirmer test for diagnosing lacrimal deficiency.
    • This innovative technique offers improved speed, patient comfort, and diagnostic accuracy.