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Related Experiment Videos

The evolution of the broken ring visual acuity test figure

J S Pointer, G Gilmartin, J R Larke

    Journal of the American Optometric Association
    |August 1, 1980
    PubMed
    Summary

    The broken ring visual acuity figure, developed by Snellen and Landolt, has evolved. Its recent use in visual performance studies involves an angular version displayed on television screens.

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    Area of Science:

    • Ophthalmology
    • Optometry
    • Vision Science

    Background:

    • The broken ring visual acuity figure is a standard optometric tool.
    • Key historical contributions to its development include those by Snellen and Landolt.

    Purpose of the Study:

    • To describe the historical evolution of the broken ring visual acuity figure.
    • To highlight its recent application in visual performance research.

    Main Methods:

    • Historical review of visual acuity figures.
    • Description of an angular version of the figure generated on a television screen.

    Main Results:

    • The broken ring figure has undergone significant evolution.
    • An angular version is effectively used in modern visual performance studies.

    Conclusions:

    • The broken ring figure remains a relevant tool in vision science.
    • Technological advancements allow for innovative applications of visual acuity testing.

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