The effective dynamic ranges of standard automated perimetry sizes III and V and motion and matrix perimetry

Michael Wall; Kimberly R Woodward; Carrie K Doyle; Gideon Zamba

doi:10.1001/archophthalmol.2010.71

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The effective dynamic ranges of standard automated perimetry sizes III and V and motion and matrix perimetry

Journal article

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Peer reviewed

The effective dynamic ranges of standard automated perimetry sizes III and V and motion and matrix perimetry

Michael Wall, Kimberly R Woodward, Carrie K Doyle and Gideon Zamba

Archives of ophthalmology (1960), Vol.128(5), pp.570-576

05/2010

DOI: 10.1001/archophthalmol.2010.71

PMID: 20457977

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Abstract

To establish the associations between threshold estimates of 4 perimetric tests and to define and compare the tests' effective dynamic ranges. We examined 152 patients with glaucoma and 80 controls using standard automated perimetry (SAP) with stimulus size III, SAP with size V, and motion and matrix perimetry. We explored the intertest associations using principal-components analysis. We defined the effective dynamic range bottom using the frequency of 0-dB trials on retest. We defined the upper effective dynamic range as a value above which fewer than 0.5% of the values fall in the controls. We also calculated the number of discriminable steps from normal to the floor value of the perimeter. The association between SAP III and V was approximately linear up to a sensitivity of about 20 dB on both tests and with motion and matrix perimetry up to about 25 dB from 0 dB. While the upper bounds were similar among the tests, size V SAP had a lower floor and more discriminable steps. The effective dynamic range of SAP III is substantially less than its physically tested limits. Size V stimuli have a greater effective dynamic range than size III by about 1 log unit and have about twice as many discriminable steps.

Motion

Visual Field Tests - methods

Sensory Thresholds

Humans

Middle Aged

Male

Glaucoma - diagnosis

Vision Disorders - diagnosis

Vision Disorders - physiopathology

Visual Fields

Sensitivity and Specificity

Aged, 80 and over

Adult

Female

Aged

Visual Field Tests - instrumentation

Glaucoma - physiopathology

Details

Title: Subtitle: The effective dynamic ranges of standard automated perimetry sizes III and V and motion and matrix perimetry
Creators: Michael Wall - Department of Neurology, College of Medicine, Veterans Administration Hospital, University of Iowa, Iowa City, IA 52242-1053, USA. michael-wall@uiowa.edu
Kimberly R Woodward
Carrie K Doyle
Gideon Zamba
Resource Type: Journal article
Publication Details: Archives of ophthalmology (1960), Vol.128(5), pp.570-576
DOI: 10.1001/archophthalmol.2010.71
PMID: 20457977
NLM abbreviation: Arch Ophthalmol
ISSN: 0003-9950
eISSN: 1538-3601
Publisher: American Medical Association; United States
Language: English
Date published: 05/2010
Academic Unit: Neurology; Radiology; Biostatistics; Ophthalmology and Visual Sciences
Record Identifier: 9983980066102771

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