The results of the color contrast sensitivity test decreased by half in patients with AMD compared with ophthalmologically healthy patients when they performed the F-M 100 test and by one and half when they performed a MCCS test in the blue color range.

The scoring artefact in the Farnsworth-Munsell 100-Hue test, arising from the grouping of the caps into four boxes, was investigated. The traditional method of scoring performed with the numbers of the anchor caps disregarded and the alternative scoring performed with the numbers of the anchor caps employed, were compared. For the traditional method of scoring, we revealed an increase of the error score of the outside (end-box) caps when the total error score was above 240. On the contrary for scoring performed with the numbers of the anchor caps employed, the difference between the error score of the outside caps and the average error per cap is not significant. To mitigate the end-box artefact and to improve the reliability of the Farnsworth-Munsell 100-Hue test, corrections to the traditional method of scoring are proposed.

According to the data of A Christianson (1992 Acta Neurologica Scandinavica86 545 – 554) the testing of half of the visual field is useful when testing patients who suffer from visual perception disorders (VPDs). With this in mind, a new computer interactive system was developed for diagnosis, testing, and rehabilitation of VPDs. Our computer interactive system was composed of several subsystems: test procedure, test records database, and machine learning algorithm. The interactive test procedure was controlled by several parameters. Results (individual tests, averages) were presented in stereo 3-D form. Individual test records were preserved and formed a database. This database was used by the machine learning algorithm (A Raskinis, 1980, FTEPI Technical Report) to create rules for VPD prediction. Medical computer-aided learning experiments with persons with some kind of VPD have been carried out in the Neurosurgical Centre of Kaunas Academic Clinics with the use of a PC (IBM AT 486). So far we have tested 52 persons with damaged right and left temporal lobes. Our objectives were: (1) to diagnose various kinds of VPD; (2) to train and rehabilitate persons with various kinds of VPD; (3) to collect and analyse data on persons who can be treated and trained; and (4) to develop efficient helping measures and new skills from the effects of intensive training.

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