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. 1995 Mar;79(3):213–217. doi: 10.1136/bjo.79.3.213

New approach to estimating variability in visual field data using an image processing technique.

D P Crabb 1, D F Edgar 1, F W Fitzke 1, A I McNaught 1, H P Wynn 1
PMCID: PMC505065  PMID: 7703196

Abstract

AIMS--A new framework for evaluating pointwise sensitivity variation in computerised visual field data is demonstrated. METHODS--A measure of local spatial variability (LSV) is generated using an image processing technique. Fifty five eyes from a sample of normal and glaucomatous subjects, examined on the Humphrey field analyser (HFA), were used to illustrate the method. RESULTS--Significant correlation between LSV and conventional estimates--namely, HFA pattern standard deviation and short term fluctuation, were found. CONCLUSION--LSV is not dependent on normals' reference data or repeated threshold determinations, thus potentially reducing test time. Also, the illustrated pointwise maps of LSV could provide a method for identifying areas of fluctuation commonly found in early glaucomatous field loss.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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