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Device for improving quantification of reading acuity and reading speed.

Alois K Dexl1, Horst Schlögel, Michael Wolfbauer

  • 1University Eye Clinic, Paracelsus Medical University, Salzburg, Austria. a dexl@salk.at

Journal of Refractive Surgery (Thorofare, N.J. : 1995)
|December 9, 2009
PubMed
Summary

The new Salzburg Reading Desk (SRD) accurately measures reading acuity and speed at a comfortable distance for patients. This device is reliable for clinical use, especially for presbyopia correction comparisons.

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Area of Science:

  • Ophthalmology
  • Optometry
  • Vision Science

Background:

  • Accurate measurement of reading acuity and speed is crucial for vision assessment.
  • Standardized testing requires consistent and convenient reading distances.
  • Presbyopia correction necessitates evaluating reading performance at the individual's best reading distance.

Purpose of the Study:

  • To introduce the Salzburg Reading Desk (SRD), a novel device for standardized reading acuity and speed testing.
  • To assess reading performance at a subjectively convenient reading distance (best distance).

Main Methods:

  • The SRD's validity and reliability were tested in a systematic setup across 450 simulated reading distances (16-70 cm).
  • SRD distance read-outs were correlated with measurements from a meter ruler.

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  • Reading distance and speed were evaluated in 27 emmetropic and presbyopic patients using log-scaled Radner Reading Charts on the SRD.

    • Main Results:

    • The SRD demonstrated high accuracy, with a mean distance read-out difference of 0.08±0.13 cm compared to a meter ruler.
    • Presbyopic patients utilized their optimal reading distance, averaging 49.74±4.43 cm.
    • Reading speed remained consistent for larger typefaces (152-157 wpm) but decreased with smaller typefaces over time.

    Conclusions:

    • The Salzburg Reading Desk (SRD) is a valid and reliable tool for assessing reading acuity at the best reading distance.
    • The SRD is suitable for both experimental settings and clinical evaluation of presbyopic patients.
    • This device is beneficial for comparing different presbyopia correction methods.