Humphrey matrix frequency doubling perimetry for detection of visual-field defects in open-angle glaucoma

C. I. Clement, I. Goldberg, P. R. Healey, S. Graham

Research output: Contribution to journalArticle

18 Citations (Scopus)
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Abstract

Aim: Matrix perimetry uses frequency-doubling technology (FDT) incorporated into a 5° test target. This permits testing of the same number of locations within a defined visual field as standard automated perimetry (SAP) and may improve performance compared with original FDT perimetry. This study investigates the performance of Humphrey Matrix perimetry for detecting glaucomatous visual-field loss. Design: Prospective case control study. Methods: We recruited 115 participants with glauco- matous visual-field loss and 33 normal controls from an urban glaucoma practice. Each participant performed SITA 24-2 SAP then threshold 24-2 Matrix perimetry. Severity of visual-field loss was defined using SAP mean deviation (MD) as early (MD >-6 dB), moderate (MD -6to - 12 dB) or advanced (MD <-12 dB). The sensitivity and specificity of Humphrey Matrix perimetry were calculated for different automated indices. Results: The matrix perimetry sensitivity and specificity were up to 100% for moderate and advanced glaucomatous visual-field loss. A receiver operator characteristic area under the curve (AUC) analysis revealed MD to be slightly better than pattern standard deviation (PSD) for defining moderate (AUC: MD 0.997; PSD 0.987) and advanced defects (AUC: MD 1.000; PSD 0.987). Matrix was less sensitive (up to 87.3%) for detecting early glaucomatous visual-field loss compared with SITA 24-2 SAP (AUC: PSD 0.948; MD 0.910). Conclusions: Matrix perimetry is excellent for detection of moderate to advanced glaucomatous visual-field loss but may miss some early defects. It may be well suited to following progression of early to moderate field loss because of a smaller target size compared with original FDT perimetry.

Original languageEnglish
Pages (from-to)582-588
Number of pages7
JournalBritish Journal of Ophthalmology
Volume93
Issue number5
DOIs
Publication statusPublished - May 2009
Externally publishedYes

Bibliographical note

Copyright retained by the author(s). Article originally published in British Journal of Opthamology, Volume 93, Issue 5, pp. 582-588. The original article can be found at http://dx.doi.org/10.1136/bjo.2007.119909. Article archived for private and non-commercial use with the permission of the author and according to publisher conditions. For further information see http://www.bmj.com/.

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