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Related Experiment Video

Updated: Jun 22, 2026

Binocular Dynamic Visual Acuity in Eyeglass-Corrected Myopic Patients
07:06

Binocular Dynamic Visual Acuity in Eyeglass-Corrected Myopic Patients

Published on: March 29, 2022

Glare testing in patients with cataract after dilation.

Michael N Wiggins1, Inci Irak-Dersu, Scott D Turner

  • 1University of Arkansas for Medical Sciences, Jones Eye Institute, Department of Ophthalmology, Little Rock, Arkansas 72205-7199, USA. wigginsmichael@uams.edu

Ophthalmology
|June 2, 2009
PubMed
Summary

Pupil dilation impacts glare testing results in over half of patients. Adjusting glare test outcomes by visual acuity changes can accurately predict pre-dilation results for cataract evaluation.

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Area of Science:

  • Ophthalmology
  • Diagnostic Test Evaluation

Background:

  • Glare testing is crucial for cataract evaluation.
  • Pupil size can influence visual function and test results.

Purpose of the Study:

  • To determine the effect of pupil dilation on glare testing outcomes.
  • To assess if glare testing results can be reliably predicted after dilation.

Main Methods:

  • Diagnostic test evaluation involving 54 adult patients.
  • Measurements of pupil size, visual acuity (VA), and glare (Brightness Acuity Tester - BAT) were taken before and after pupil dilation.
  • Cataract grading was performed using the Lens Opacification Classification System III.

Main Results:

  • Pupil dilation caused a loss of 1 or more lines of vision in 53.7% of patients during BAT testing.
  • Adjusting dilated BAT results by the change in VA accurately predicted undilated BAT results within 1 line in 81.5% of cases.
  • This adjustment method predicted results within 2 lines of accuracy in 96.3% of patients.

Conclusions:

  • Pupil dilation significantly affects glare testing results in a substantial portion of patients.
  • Visual acuity changes following dilation can be used to accurately adjust and predict pre-dilation glare testing outcomes.
  • This predictive method enhances the reliability of glare testing in cataract evaluations.