Patent ID: 8020996
Filing Date: 2011-09-20
Classification: A61B

Abstract:
1. An operational method for a kinetic perimeter comprising: a step of visual field scanning screen generating means for generating, on an output device, a visual field scanning screen for scanning a visual field of a subject; a step of fixation image scan line setting means for setting a fixation image scan line and a fixation image display position, for carrying out the scanning of changing the display position of a fixation image with a predetermined spacing, on the visual field scanning screen that is generated, on the output device, by said step of visual field scanning screen generating means; a step of fixation image displaying and controlling means for displaying and controlling a fixation image to be fixated by the subject, during a visual field scanning, at a fixation image display position on the fixation image scan line which is set by said step of fixation image scan line setting means; a step of visual target scan line orthogonally setting means for setting a visual target scan line normal to said fixation image scan line, to scan a visual target on said visual field scanning screen; a step of visual target displaying and controlling means for displaying and scanning said visual target on said visual field scanning screen along the visual target scan line set by said step of visual target scan line orthogonally setting means, in order to scan the visual field; a step of statically displaying and controlling means, which is comprised in said step of visual target displaying and controlling means, for statically displaying and controlling said visual target for a predetermined moment on said visual target scan line; a step of static display position storing means for storing, on a memory device, a position of said visual target statically displayed and controlled for said predetermined moment by said step of statically displaying and controlling means; a step of kinetic display and control starting means, which is comprised in said step of visual target displaying and controlling means, for starting a kinetic scan of said visual target along said visual target scan line after said step of statically displaying and controlling means has displayed and controlled said visual target statically for said predetermined moment; a step of detecting means for, via an input device, detecting a time when said kinetic scan, started by said step of kinetic display and control starting means, of said visual target has first been perceived by the subject's visual field; a step of detection position storing means for storing, on the memory device, a position of said visual target at the time of the detection by said step of detecting means; a step of visual field mapping screen generating means for generating a visual field mapping screen, on an output device, to map and display the subject's visual field; a step of visual field mapping means for carrying out a visual field mapping on said visual field mapping screen, referring to a position of said visual target stored by said step of static display position storing means and a position of said visual target stored by said step of detection position storing means; a step of kinetic scan stopping means for stopping, through said step of visual target displaying and controlling means, said kinetic scan of said step of kinetic display and control starting means if the time when said kinetic scan has first been perceived by the subject's visual field is detected by said step of detecting means; a step of under the same fixation image scanning continuation means for, by said step of visual target displaying and controlling means through said step of statically displaying and controlling means, displaying and controlling said visual target statically for said predetermined moment, on said visual target scan line at the position of said visual target stored by said step of detection position storing means, and proceeding from said step of static display position storing means onward as above, and continuing the similar scan, under said fixation image displayed, of said visual target scan line by iterating above procedure along said visual target scan line under the condition of said fixation image being displayed by said step of fixation image displaying and controlling means, in order to continue the next scan of said visual target scan line; and a step of scanning switching means, to the scanning under the next fixation image, for, if the scan, under said fixation image, of said visual target scan line is completed by said step of under the same fixation image scanning continuation means, continuing the similar scan, under a next fixation image being displayed, of said visual target scan line by said step of visual target displaying and controlling means with the next fixation image being said fixation image whose display position is changed, by said step of fixation image displaying and controlling means, to a position with said predetermined spacing, along the fixation image scan line set by said fixation image scan line setting means.