Classification of visual field abnormalities in the ocular hypertension treatment study.

Published

Journal Article

OBJECTIVES: (1) To develop a classification system for visual field (VF) abnormalities, (2) to determine interreader and test-retest agreement, and (3) to determine the frequency of various VF defects in the Ocular Hypertension Treatment Study. METHODS: Follow-up VFs are performed every 6 months and are monitored for abnormality, indicated by a glaucoma hemifield test result or a corrected pattern SD outside the normal limits. As of January 1, 2002, 1636 patients had 2509 abnormal VFs. Three readers independently classified each hemifield using a classification system developed at the VF reading center. A subset (50%) of the abnormal VFs was reread to evaluate test-retest reader agreement. A mean deviation was calculated separately for the hemifields as an index to the severity of VF loss. MAIN OUTCOME MEASURES: A 97% interreader hemifield agreement. RESULTS: The average hemifield classification agreement (between any 2 of 3 readers) for 5018 hemifields was 97% and 88% for the 1266 abnormal VFs that were reread (agreement between the first and second classifications). Glaucomatous patterns of loss (partial arcuate, paracentral, and nasal step defects) composed the majority of VF defects. CONCLUSION: The Ocular Hypertension Treatment Study classification system has high reproducibility and provides a possible nomenclature for characterizing VF defects.

Full Text

Cited Authors

  • Keltner, JL; Johnson, CA; Cello, KE; Edwards, MA; Bandermann, SE; Kass, MA; Gordon, MO; Ocular Hypertension Treatment Study Group,

Duke Contributors

Published Date

  • May 2003

Published In

Volume / Issue

  • 121 / 5

Start / End Page

  • 643 - 650

PubMed ID

  • 12742841

Pubmed Central ID

  • 12742841

International Standard Serial Number (ISSN)

  • 0003-9950

Digital Object Identifier (DOI)

  • 10.1001/archopht.121.5.643

Language

  • eng

Conference Location

  • United States