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Correcting Finger Counting to Snellen Acuity.

Rustum Karanjia1, Tiffany Jean Hwang2, Alexander Francis Chen2

  • 1Doheny Eye Institute, Los Angeles, California, USA; Doheny Eye Center, David Geffen School of Medicine at UCLA, Los Angeles, California, USA; Ottawa Eye Institute, University of Ottawa, Ottawa, Canada; Ottawa Health Research Institute, Ottawa, Ontario, Canada.

Neuro-Ophthalmology (Aeolus Press)
|December 9, 2016
PubMed
Summary
This summary is machine-generated.

This study introduces an online tool to convert qualitative finger-counting visual acuity measurements into quantitative Snellen equivalents. This facilitates re-interpreting historical vision data for better analysis.

Keywords:
Count fingersSnellenvisual acuity

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Area of Science:

  • Ophthalmology
  • Optometry
  • Vision Science

Background:

  • Visual acuity assessment is crucial in eye care.
  • Count finger (CF) testing is a common but qualitative measure.
  • Retrospective data often uses CF for visual acuity.

Purpose of the Study:

  • To develop an online tool for converting CF visual acuity to Snellen equivalents.
  • To enable quantitative analysis of historical vision data.
  • To standardize visual acuity reporting.

Main Methods:

  • Development of a computational tool.
  • Input: qualitative count finger measurements.
  • Output: quantitative Snellen equivalent visual acuity values.

Main Results:

  • Successful conversion of count finger measurements to Snellen equivalents.
  • Demonstrated utility for re-interpreting retrospective data.
  • Provided a standardized method for visual acuity quantification.

Conclusions:

  • The online tool offers a valuable method for standardizing visual acuity data.
  • Facilitates more robust analysis of historical ophthalmological and optometric records.
  • Enhances the interpretation of past vision screening results.