In a perimeter, luminance judging means measures a sensitivity of an examinee, sensitivity deviation computing means obtains a sensitivity deviation, means for computing ratio to p value obtains a ratio to p value, and means for adding ratios to p value adds ratios to p value of respective measurement positions. The sensitivity deviation at the position where sensitivity dispersion is large is low evaluated and the sensitivity deviation at the position where the sensitivity dispersion is small is highly evaluated. Then, an element of the position where the sensitivity was changed can be also considered in a graph showing test results of perimetry periodically conducted with time.
