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Related Experiment Videos

Parallel-testing infinity balance. Instrument and technique for the parallel testing of binocular vision

I J Shapiro

    Optometry and Vision Science : Official Publication of the American Academy of Optometry
    |December 1, 1995
    PubMed
    Summary

    The Parallel-Testing Infinity Balance (PTIB) is a new tool for eye exams. It helps eye care professionals see how changing one test affects others during routine refraction, improving binocular vision assessment.

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    Area of Science:

    • Ophthalmology
    • Optometry
    • Vision Science

    Background:

    • Routine eye refraction involves sequential tests where early parameters may be invalidated by later adjustments.
    • Current binocular testing devices do not allow practitioners to observe the interdependencies between changing refractive parameters.

    Purpose of the Study:

    • To introduce the Parallel-Testing Infinity Balance (PTIB) as a novel device for assessing binocular vision during routine refraction.
    • To demonstrate the PTIB's capability in evaluating the impact of parameter changes on other visual metrics.

    Main Methods:

    • The PTIB is an adaptation of the established Turville Infinity Balance.
    • The device is designed for comprehensive binocular balancing, addressing multiple visual parameters simultaneously.

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    Main Results:

    • The PTIB provides a tool to monitor how adjustments in one parameter affect others during refraction.
    • It facilitates the assessment of binocularity, including suppression, astigmatic distortion, and various imbalances.

    Conclusions:

    • The Parallel-Testing Infinity Balance (PTIB) offers a significant advancement in binocular vision testing.
    • Its design allows for a more dynamic and integrated assessment of visual parameters during routine eye examinations.