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Comparative study of computer-based and standard clinical accommodative facility testing methods.

M W Rouse1, G M Freestone, B A Weiner

  • 1Southern California College of Optometry, Fullerton.

Optometry and Vision Science : Official Publication of the American Academy of Optometry
|February 1, 1991
PubMed
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The Computer Orthoptics Diagnostic Program is not a valid method for assessing accommodative facility. This study found no correlation between its results and the standard Lens Flipper Method, indicating poor diagnostic agreement for visual screening.

Area of Science:

  • Ophthalmology
  • Optometry
  • Vision Science

Background:

  • Accurate assessment of accommodative facility is crucial for diagnosing visual dysfunctions.
  • The Computer Orthoptics Diagnostic Program (CODP) offers a digital approach to evaluating accommodative facility.
  • The Lens Flipper Method (LFM) is a traditional clinical technique for assessing accommodative facility.

Purpose of the Study:

  • To compare the validity and reliability of the CODP against the standard LFM for assessing accommodative facility.
  • To determine the level of agreement between the two methods in classifying subjects' accommodative status.

Main Methods:

  • Forty visually normal subjects aged 10-18 years were recruited.
  • Participants underwent accommodative facility testing using both the CODP and LFM, in random order.

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  • Monocular and binocular testing was performed, with data analyzed using scatter-plots and kappa statistics.

    • Main Results:

    • Scatter-plot analysis revealed near-zero correlation coefficients between the CODP and LFM for both monocular (r = 0.0205) and binocular (r = 0.1180) testing.
    • The kappa statistic indicated a low level of agreement between the two methods for both monocular and binocular assessments.
    • Diagnostic classifications (pass/fail) showed substantial discrepancies between the CODP and LFM.

    Conclusions:

    • The CODP demonstrates poor validity and reliability when compared to the established LFM for assessing accommodative facility.
    • The findings suggest that the CODP may not be a suitable diagnostic tool for identifying accommodative deficiencies.
    • Further research is warranted to validate digital vision screening tools against established clinical methods.