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Detecting glaucomatous progression with infrequent visual field testing.

Andrew J Anderson1, Rashima Asokan2, Hiroshi Murata3

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|January 10, 2018
PubMed
Summary
This summary is machine-generated.

Infrequent visual field testing minimally impacts 2-year predictive values for glaucoma progression. However, it significantly delays the earliest detection of rapid visual field loss, emphasizing the need for appropriate slope criteria.

Keywords:
glaucomaperimetrypositive predictive valueprogressionvisual field

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Area of Science:

  • Ophthalmology
  • Medical Imaging
  • Biostatistics

Background:

  • Glaucoma visual field progression is typically assessed using Mean Deviation (MD) regression slopes.
  • Clinical practice often involves fewer than the recommended six visual fields within the first two years.
  • The impact of reduced testing frequency on predicting rapid glaucoma progression remains unclear.

Purpose of the Study:

  • To investigate how reduced visual field test frequency affects the prediction of rapid glaucomatous visual field progression.
  • To evaluate the influence of incorporating regression slope criteria on predictive accuracy.
  • To compare simulation results with empirical data from a glaucoma patient cohort.

Main Methods:

  • Simulated 100,000 visual field series with varying test frequencies (annual then biennial).
  • Calculated positive predictive values (PPV) and negative predictive values (NPV) for rapid progression detection.
  • Validated simulation methodology using a dataset of 255 glaucoma patients from The University of Tokyo Hospital.

Main Results:

  • Reduced test frequency slightly decreased prediction values at 2 years compared to six visual fields.
  • Adding a slope-based criterion significantly improved PPV with minimal impact on NPV.
  • Simulated prediction values aligned with empirical findings from the Tokyo dataset.

Conclusions:

  • Infrequent visual field testing does not drastically alter 2-year predictive values for glaucoma progression.
  • However, reduced testing substantially delays the initial detection of significant visual field progression.
  • The inclusion of slope criteria is crucial for improving the prediction of rapid glaucoma progression, even with less frequent testing.