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Related Experiment Videos

Accommodative response during distance optometric test procedures.

M Rosenfield1, K J Ciuffreda, J Rosen

  • 1Department of Vision Sciences, SUNY/State College of Optometry, NY 10010.

Journal of the American Optometric Association
|September 1, 1992
PubMed
Summary

This study found that standard clinical procedures for assessing distance vision do not significantly alter the eye's accommodative response. Accommodation remains robust, showing minimal changes across various testing conditions.

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Area of Science:

  • Optometry and Vision Science
  • Ocular Physiology

Background:

  • Accurate assessment of distance vision requires understanding the control of accommodation.
  • Accommodation is the eye's ability to adjust focus for different distances.

Purpose of the Study:

  • To investigate the steady-state accommodative response during common clinical optometric procedures at a 6-meter viewing distance.
  • To determine if simulated retinoscopy or lens introduction affects accommodative behavior.

Main Methods:

  • Accommodation was measured in 13 visually normal young adults using a Hartinger coincidence optometer.
  • Measurements were taken during distance viewing, simulated retinoscopy, and after adding cylindrical and prismatic lenses.

Main Results:

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  • No significant changes in the mean accommodative response were observed across the tested clinical procedures.
  • Subjects consistently demonstrated a slight lead of accommodation (approx. 0.25D) under all conditions.

    • Conclusions:

    • The eye's accommodative system is robust and stable during typical distance vision assessments.
    • Clinical procedures, even with lens manipulations, do not substantially disrupt steady-state accommodation.