The distribution of normal values in automated perimetry

From 354 visual fields of 137 normal subjects, various components of variance were calculated separately for each test location of the Octopus automated-perimetry program J0. The method of component analysis of variance was used. The following components were analyzed: interindividual variation (variation of visual-field measurements in different subjects), long-term fluctuation (variation of different visual-field measurements in the same subject), differences between the right and left eyes and fluctuation within one visual field test in one subject, i.e., short-term fluctuation. The results show increased variations at the center relative to the paracentral area and a slight increase with eccentricity.