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Factors Influencing Short-term Fluctuation

Josef Flammer, MD; Stephen M. Drance, MD; Franz Fankhauser, MD; Lotti Augustiny

Arch Ophthalmol. 1984;102(6):876-879.

Abstract
• The scatter of the differential light threshold observed during a single visual field test is called the short-term fluctuation. A number of factors that may influence the magnitude of the short-term fluctuation were studied. The main factor was the level of the differential light sensitivity itself, followed by the rate of false responses in the catch trials. The pupil size was only notable in patients with glaucoma, while age as well as the mean reaction time did not appear to be notable. The short-term fluctuation is not dependent on the location in the visual field up to 27° of eccentricity degrees tested in normal subjects and patients suspected of having glaucoma, but there is a slight tendency in patients with glaucoma for a larger short-term fluctuation in the upper half of the visual field.

Author Affiliations
From the Departments of Ophthalmology, University of Bern, Switzerland (Drs Flammer and Fankhauser and Ms Augustiny) and the University of British Columbia, Vancouver (Dr Drance).

Footnotes
Accepted for publication Oct 13, 1983.

Reprint requests to Universitat Bern, Augenklinik Inselspital, CH-3010 Bern, Switzerland (Dr Flammer).

This investigation was supported in part by the E. A. Baker Foundation for the Prevention of Blindness and grant MT-1578 from the Medical Research Council of Canada.

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