April 2009
Volume 50, Issue 13
Free
ARVO Annual Meeting Abstract  |   April 2009
Comparing the Advanced Glaucoma Intervention Study (AGIS) and Brussini’s Glaucoma Severity Scale (GSS-Br) Scoring Systems Using Theoretical Threshold Data
Author Affiliations & Notes
  • D. W. Switzer
    Ophthalmology, Nassau University Medical Center, East Meadow, New York
  • S.-Y. Wu
    Preventive Medicine,
    SUNY at Stony Brook, Stony Brook, New York
  • M. C. Leske
    Preventive Medicine,
    SUNY at Stony Brook, Stony Brook, New York
  • A. Hennis
    Preventive Medicine,
    SUNY at Stony Brook, Stony Brook, New York
  • B. Nemesure
    Preventive Medicine,
    SUNY at Stony Brook, Stony Brook, New York
  • N. Mehta
    Ophthalmology,
    SUNY at Stony Brook, Stony Brook, New York
  • R. A. Honkanen
    Ophthalmology,
    SUNY at Stony Brook, Stony Brook, New York
  • L. Hyman
    Ophthalmology,
    SUNY at Stony Brook, Stony Brook, New York
  • Footnotes
    Commercial Relationships  D.W. Switzer, None; S.-Y. Wu, None; M.C. Leske, None; A. Hennis, None; B. Nemesure, None; N. Mehta, None; R.A. Honkanen, None; L. Hyman, None.
  • Footnotes
    Support  None.
Investigative Ophthalmology & Visual Science April 2009, Vol.50, 5288. doi:
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      D. W. Switzer, S.-Y. Wu, M. C. Leske, A. Hennis, B. Nemesure, N. Mehta, R. A. Honkanen, L. Hyman; Comparing the Advanced Glaucoma Intervention Study (AGIS) and Brussini’s Glaucoma Severity Scale (GSS-Br) Scoring Systems Using Theoretical Threshold Data. Invest. Ophthalmol. Vis. Sci. 2009;50(13):5288.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

Purpose: : To compare visual field (VF) scores, as calculated with the AGIS and GSS-Br methods, for global depression (GD), superior arcuate (SA), paracentral (PC), and superior nasal step (SNS) defects of varying depths.

Methods: : A program was written in Filemaker Pro 8 to calculate AGIS and GSS-Br scores and generate VF parameters from theoretical threshold data, as described in another abstract. Baseline thresholds were set to the calculated normative threshold values for a 50 year old. The Humphrey VF (HVF) 24-2 pattern was used. GD was defined as a depression in all 54 VF test locations. SA defect was defined as a depression in test locations 15, 20, 21, 23,24,1,7,10, and 11. SNS defect was defined as depression in test locations 6, 5, 4, 9 and 8. Paracentral defect (PC) defect was defined as depression in test locations 2, 16, 29, and 42. (All described for 24-2 pattern HVF). Simulated GD, SA, SNS, and PC defects were increased in 2 dB increments up to 30 dB. AGIS and GSS-Br scores were calculated and compared for each.

Results: : Both AGIS and GSS-Br systems showed relatively good correlation with scores with scores that increased with the severity of the field defect as shown in the table below. AGIS and GSS-Br scores reached their maximal levels with 28 and 22 dB of GD, respectively, with similar results for SA defect.

Keywords: visual fields • computational modeling 
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