Related Experiment Video
Updated: Aug 30, 2026
Assessing Early Stage Open-Angle Glaucoma in Patients by Isolated-Check Visual Evoked Potential
Published on: May 25, 2020
Learning effect, normal range, and test-retest variability of Frequency Doubling Perimetry as a function of age,
Govert P Heeg1, Theodorus L Ponsioen, Nomdo M Jansonius
1Department of Ophthalmology, University Hospital Groningen, PO Box 30.001, 9700 RB Groningen, The Netherlands.
Abstract:
The learning effect for several different Frequency Doubling Perimetry parameters was studied in full threshold mode in a large group of patients (n = 342) of various ages, with and without perimetric experience, and with and without glaucoma. A significant learning effect was only found for the mean deviation (MD) in aged normals without perimetric experience. The median of MD increased for both OD (from +0.2 to +1.0 dB) and for OS (from +0.5 to +1.3 dB). The effect disappeared largely during a third visit (median OD +1.2 dB, OS +1.3 dB). The normal range and the test-retest variability were measured in the same dataset. The learning effect for MD (1 dB or less) appeared to be small as compared with both the normal range (about 12 dB) and the test-retest variability (about 3 dB).
