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Related Experiment Videos

The relation between night myopia and accommodative convergence

C E Bohman, J J Saladin

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

    Night myopia may involve changes in lens convexity, but convergence does not consistently change with accommodation. Variability in the convergence mechanism explains this lack of a tight relationship during night myopia.

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    Area of Science:

    • Ophthalmology
    • Vision Science
    • Physiological Optics

    Background:

    • Accommodation and convergence are typically closely linked in visual function.
    • Night myopia is a condition characterized by reduced visual acuity in low light.
    • Understanding the relationship between accommodation and convergence is crucial for diagnosing and managing refractive errors.

    Purpose of the Study:

    • To investigate the relationship between accommodation and convergence in the context of night myopia.
    • To determine if changes in lens convexity during night myopia correlate with convergence.

    Main Methods:

    • The study likely involved measuring accommodation and convergence responses under varying light conditions.
    • Analysis focused on the expected correlation between accommodative changes and convergence.

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    Main Results:

    • The prediction that accommodation changes in night myopia would be matched by convergence changes was found to be false.
    • Significant variability was observed within the convergence mechanism, disrupting the expected tight coupling.

    Conclusions:

    • The tight relationship between accommodation and convergence may be disrupted in night myopia.
    • Variability in the convergence system is a key factor explaining the lack of commensurate changes during night myopia.