Journal article
Characteristics of the normative database for the Humphrey matrix perimeter
Investigative ophthalmology & visual science, Vol.46(4), pp.1540-1548
04/2005
DOI: 10.1167/iovs.04-0968
PMCID: PMC2581814
PMID: 15790927
Abstract
The Humphrey Matrix (Carl Zeiss Meditec, Dublin CA; Welch-Allyn, Skaneateles, NY) is a high-spatial-resolution perimeter that uses frequency-doubling stimuli. It incorporates an efficient test strategy that assumes that age, eccentricity, and test procedure type have only small effects on sensitivity. The results used to create the normative database for the perimeter were examined, to see whether these assumptions were met and to examine the form of the normative data. Visual fields were measured (Matrix 30-2, 24-2, 10-2 and Macula patterns) in >275 subjects judged to be normal by a battery of clinical procedures. The right eye was always tested first. Sensitivity decreased by approximately 0.7 dB per age decade across all eccentricities; sensitivity decreased with eccentricity, typically by <5 dB at the most peripheral points tested. Although there was no systematic difference in sensitivity between the 30-2 and 24-2 tests, the Macula test sensitivities were typically 1 dB higher than for the 10-2 test. Sensitivity in the left eye was slightly lower than in the right, with the difference being significantly greater in the temporal visual field. In most test locations, the 95% confidence interval of normal sensitivity was approximately 6 dB below the median sensitivity. The performance of the test strategy in the Matrix perimeter is appropriately matched to the response characteristics of the normal population. The finding of a spatially nonuniform difference in sensitivity between left and right eyes is attributable to light-adaptation differences between the eyes. This effect is accounted for in the perimeter's normative database.
Details
- Title: Subtitle
- Characteristics of the normative database for the Humphrey matrix perimeter
- Creators
- Andrew John Anderson - Discoveries in Sight, Devers Eye Institute, Portland, Oregon, USAChris A JohnsonMurray FingeretJohn L KeltnerPaul G D SpryMichael WallJohn S Werner
- Resource Type
- Journal article
- Publication Details
- Investigative ophthalmology & visual science, Vol.46(4), pp.1540-1548
- Publisher
- United States
- DOI
- 10.1167/iovs.04-0968
- PMID
- 15790927
- PMCID
- PMC2581814
- ISSN
- 0146-0404
- eISSN
- 1552-5783
- Grant note
- R01 EY003424 / NEI NIH HHS EY03424 / NEI NIH HHS AG04058 / NIA NIH HHS R37 AG004058-21 / NIA NIH HHS R37 AG004058 / NIA NIH HHS R01 AG004058 / NIA NIH HHS
- Language
- English
- Date published
- 04/2005
- Academic Unit
- Neurology; Ophthalmology and Visual Sciences
- Record Identifier
- 9983979940802771
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