Method of analysis of serial visual fields

Details Method of analysis of serial visual fields Method of analysis of serial visual fields

1992-01-28

1995-05-02

Hayes, Gail O.

Boots, shoes, and leggings

36441301, 128745, 606 4, 607 91, 607 93, 382128, 351226, 351246, G06F 1542

Patent

active

054125618

ABSTRACT:
A method of analyzing serial automated visual field data calculates a total field vector of the threshold sensitivity of points in a visual field and compares the total field vector with a calculated normal field vector for a given patient. The vector angle between the total field vector and the normal field vector is calculated to determine the distribution of threshold sensitivities to characterize the localization and the magnitude of field changes. In one embodiment, the sensitivities of each point in the visual field with respect to normal sensitivities for each point is plotted for each of a series of time spaced visual field tests. The single plot uses a line symmetrical about a zero axis whose magnitude reflects the difference from the norm for each point in each exam and forms a graphic depiction of changes in the visual field at each point over a series of visual field tests. Linear regression analysis is performed on the visual field data and provides an indication of trends of visual field changes.

REFERENCES:
Perimeter Digest, H. Bebie et. al., Interzeag AG, 8952 Schlieren, Switzerland, 1983, pp. 1-50.
The Field Analyzer Primer, Second Edition, Allergan Humphrey, 1987, pp. 1-37.
New Software Releases for the Humphrey Field Analyzer and STATPAC +PLUS.TM., Allergan Humphrey, San Leandro, Calif., Oct., 1988 pp. 1-18.
New Releases for the Humphrey Field Analyzer, Introducing STATPAC 2 Allergan Humphrey, San Leandro, Calif., 1989, pp. 1-25.
ARVO Annual Meeting Abstract Issue, Mar. 15, 1990, vol. 31, No. 4, p. 15, No. 68-40.
"New Methods of Analysis of Serial Visual Fields", Marshall Curlin et al., May 3, 1991.
International Perimetric Society Meeting Display, Malmo, Sweden, Jun., 1990. (Photograph & copies of display).

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