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A simple continuously recording infrared optometer.

J V Lovasik

    American Journal of Optometry and Physiological Optics
    |January 1, 1983
    PubMed
    Summary
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    A new infrared optometer accurately measures dynamic ocular accommodation changes. This device, based on the Scheiner principle, offers practical advantages for animal research and human studies with controlled eye movements.

    Area of Science:

    • Ophthalmology
    • Vision Science
    • Biomedical Engineering

    Background:

    • Accurate measurement of ocular accommodation is crucial for understanding visual function.
    • Existing optometers have limitations in dynamic measurement and practical application.
    • The Scheiner principle offers a basis for developing novel optometric devices.

    Purpose of the Study:

    • To describe the design of a continuously recording infrared optometer.
    • To evaluate its performance for measuring dynamic changes in ocular accommodation.
    • To present a schematic eye model for assessing the optometer's dynamic response.

    Main Methods:

    • The optometer utilizes infrared light and operates on the Scheiner principle.
    • A high signal-to-noise ratio is achieved through the design.

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  • A schematic eye model was developed for dynamic response assessment.

    • Main Results:

    • The designed optometer provides continuous recording of ocular accommodation.
    • It demonstrates practical advantages over previously described optometers.
    • The device is suitable for animal experimentation and human studies with controlled eye movements.

    Conclusions:

    • The novel infrared optometer is a valuable tool for dynamic accommodation research.
    • Its design offers improved performance and versatility.
    • Further calibration methods are discussed for absolute unit measurements.