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A method to quantify different glaucomatous visual field defects is presented. Three visual field indices are calculated: the short-term fluctuation, the mean defect, and the corrected loss variation. The method was applied to visual fields tested with program JO on the Octopus automated perimeter. The indices of 130 glaucoma suspects and 50 glaucoma… (More)
The G1 glaucoma program is now widely employed in Octopus automated perimetry in order to detect early visual field damage and as an aid in regular follow up. For some patients, however, the examination duration, about 20 minutes, can be excessive. Three methods which could be used for an abbreviated initial screening phase were studied: 1) examining 30… (More)
Experience with a number of visual fields has shown that the algorithm used earlier for estimating general depression in glaucomatous visual fields was too conservative. A new, more sophisticated algorithm for calculating diffuse loss has been devised and the results obtained in the evaluation of 20 glaucomatous visual fields were compared with those… (More)
The separation of diffuse loss from more localized loss in the glaucomatous visual field is desirable for a number of reasons. In previous papers, the characteristics of several methods and algorithms for distinguishing among normal visual fields and those exhibiting diffuse and localized loss have been described and compared. In particular, a new diffuse… (More)
Some clinical application possibilities of a spatially adaptive program (SAPRO) are presented and analyzed. Due to the ability of the program to adapt operationally to the visual field situation that is encountered, useful clinical findings can be obtained, even in patients with complicated visual field disturbances. The spatially adaptive detection… (More)
The coefficients of internal consistency and retest reliability had been rarely investigated within the methodology of dream content analysis. Analyzing a dream series of elderly, healthy persons obtained from weekly telephone interviews, the internal consistency of a series of 20 dreams and retests after 4 or 22 weeks, respectively, had been computed. The… (More)
Two visual field indices, the mean defect (MD) of Flammer and the mean deviation (MD) of Heijl, have found wide acceptance among perimetrists. We compared these indices in 169 visual fields from normal- and high-tension glaucomatous eyes. Visual field damage in these eyes varied from slight to severe. In computations of the mean deviation index, the… (More)
The main visual field indices of Flammer and the analogous ones of Heijl have been compared based on a population of 113 glaucomatous visual fields. It is shown that for the population studied, the differences between the two sets of indices are negligible for Octopus G1 program results and that they may thus be used interchangeably.
The mean defect index of Flammer and the mean deviation index of Heijl have been compared based on a study of 169 glaucomatous visual fields. It is shown that in the cases studied the differences between the two indices are negligible for Octopus G1 program results and that they may thus be used interchangeably.
The SAPRO program devised for the OCTOPUS 201 automated perimeter, consists of a number of program components. It is designed to be used on the Octopus 201 computer. In its measurement mode, it employs an algorithm which achieves high speed and efficiency. This is made possible by a threshold bracketing strategy which is simpler than the normal OCTOPUS… (More)