The influence of the learning effect on automated perimetry in patients with suspected glaucoma

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Abstract
The influence of the learning effect on the outcome of automated perimetry was studied as a function of eccentricity. The sample comprised 20 patients with suspected glaucoma who were all naive to automated perimetry. Visual field examination of the right eye follwed by that of the left eye was undertaken on each of three successive days and after a further interval of 12 days using a customised full-field program of the Humphrey Field Analyser 630 (stimulus size III). The program comprised 60 points out to an eccentricity of 60'' with an interstimulus grid of 12''. Global, central, peripheral, superior and inferior mean sensitivity each significantly increased (P .ltoreq. 0.01) from the first to the second right eye examinations adn from the third to the fourth left eye examinations (P .ltoreq. 0.01). The global shortterm fluctuation, central mean defect and number of stimulus presentations decreased from the first to the second right eye examination (P 0.01). The order of examination between eyes and the interval between examination sessions influences the response recorded by automated perimetry.