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Related Experiment Videos

A pocket corneal astigmatism indicator

S W Cohen

    Ophthalmic Surgery
    |May 1, 1980
    PubMed
    Summary
    This summary is machine-generated.

    A new handheld device provides a quick, qualitative assessment of corneal astigmatism. This self-illuminated instrument projects dots onto the cornea to estimate astigmatism and its meridians.

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    Area of Science:

    • Ophthalmology
    • Optometry
    • Medical Diagnostics

    Background:

    • Corneal astigmatism is a common refractive error.
    • Accurate measurement of astigmatism is crucial for vision correction.

    Purpose of the Study:

    • To introduce a novel, pocket-sized instrument for the rapid, qualitative estimation of corneal astigmatism.
    • To describe the diagnostic capabilities of this self-illuminated device.

    Main Methods:

    • Development of a battery-operated, self-illuminated diagnostic instrument.
    • The instrument projects radially disposed white dots from the corneal center to periphery.
    • The projection pattern mimics an astigmatic dial for visual assessment.

    Main Results:

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    • The instrument enables a rapid qualitative assessment of corneal astigmatism.
    • It facilitates the identification of the involved meridians of astigmatism.
    • The device is portable and easy to use for quick estimations.

    Conclusions:

    • This pocket-sized instrument offers a convenient method for the preliminary evaluation of corneal astigmatism.
    • It serves as a valuable tool for optometrists and ophthalmologists in initial patient screening.
    • Further studies may explore its quantitative accuracy and clinical utility.