height variance linear regression analysis development field indices probability maps 2022-05-10T10:36 computerized visual field visual field indices chapter We have devised a package for the statistical analysis of computerized visual fields. It is based on a new mathematical model of the normal visual field and intended to facilitate interpretation of single fields and to illustrate changes over time in consecutive threshold fields. Single field analyses include maps showing pointwise total and pattern deviations from the age-corrected normal reference field. These maps are displayed both numerically, in dB, and as noninterpolated greyscaled probability maps illustrating the statistical significance of measured deviations. These probability maps help emphasize shallow, but significant, depressions in the paracentral field while frequently occurring false positive deviations occurring in the midperiphery are de-emphasized. Visual field indices, summarizing the deviations of height (Mean Deviation) and shape (Pattern Standard Deviation and Corrected Pattern Standard Deviation) of the measured field are weighted according to the normal variance among healthy individuals and printed out together with level of statistical significance. For follow-up the programme contains several different options. These range from an Overview format where threshold printouts and probability maps from several tests are printed in reduced size, but without any reduction of data, on a single sheet of paper, to a box plot format where the development of the field is shown with an intermediate degree of data reduction and a format employing a high degree of data reduction: graphs over visual field indices over time. If five or more tests are available a linear regression analysis of Mean Deviation is automatically performed. The programme will become available in the Humphrey Field Analyzer. field levels statistical significance deviation of height test program analysis intermediate degree A package for the statistical analysis of visual fields individuals 1987 153-168 more tests normal visual fields data positive deviation Humphrey Field Analyzer false sheets analyzer high degree normal variance visual field chapters model healthy individuals field analysis index degree mathematical model reduction of data time threshold field significance statistical analysis total reference field paper different options https://scigraph.springernature.com/explorer/license/ options reduced size regression analysis new mathematical model size en format reduction paracentral field plot format maps printouts changes 1987-01-01 shape https://doi.org/10.1007/978-94-009-3325-5_23 data reduction depression single-field analysis Field Analyzer midperiphery single sheet interpretation package single field mean deviation pattern deviation deviation Statistics Anders Heijl Lindgren Georg Heijl A. Springer Nature Mathematical Sciences Olsson Jonny Greve E. L. pub.1016118418 dimensions_id Springer Nature - SN SciGraph project Department of Mathematical Statistics, Box 118, S 221 00, Lund, Sweden Department of Mathematical Statistics, Box 118, S 221 00, Lund, Sweden Department of Ophthalmology, Malmö General Hospital, S-214 01, Malmö, Sweden Department of Ophthalmology, Malmö General Hospital, S-214 01, Malmö, Sweden 978-94-009-3325-5 Seventh International Visual Field Symposium, Amsterdam, September 1986 978-94-010-7993-8 doi 10.1007/978-94-009-3325-5_23