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Parameters of fixation disparity

D B Carter

    American Journal of Optometry and Physiological Optics
    |September 1, 1980
    PubMed
    Summary

    Fixation disparity, a measure of binocular vision stress, is influenced by individual differences, fusion demands, and adaptation. Understanding these factors is crucial for clinical and research applications.

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    Area of Science:

    • Ophthalmology
    • Vision Science
    • Neuroscience

    Background:

    • Fixation disparity is a key indicator of binocular vision status.
    • Understanding its determinants is essential for diagnosing visual stress.

    Purpose of the Study:

    • To review the definition, causation, and significance of fixation disparity.
    • To explore the parameters influencing fixation disparity magnitude and character.

    Main Methods:

    • Literature review on fixation disparity.
    • Analysis of factors affecting motor and sensory binocular processes.
    • Examination of fusion clues and vergence adaptation.

    Main Results:

    • Fixation disparity magnitude is influenced by individual efficiency in binocularity.
    • Motor fusion demands, presence of fusion clues, and vergence adaptation significantly affect fixation disparity.
    • Prism-induced demands can alter fixation disparity.

    Conclusions:

    • Fixation disparity is a valuable indicator of binocular stress in clinical and research settings.
    • Multiple parameters interact to determine fixation disparity characteristics.

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