Patent ID: 7475988

Claim:
Perimeter for conducting two or more kinds of perimetries, comprising: a memory for storing a perimetry result for each examinee as sensitivity distribution data of a visual field on a visual field coordinate system as well as a kind of said perimetry conducted; input means for inputting identification data of an examinee and a kind of said perimetry to be conducted on said examinee; reexamination judging means for judging whether or not said examinee corresponding to said identification data has already received said perimetry on the basis of said identification data of said examinee which has been inputted through said input means; means to read examinee measurement information for searching said memory so as to read examinee measurement information which corresponds to said identification data if a judgment is that said examinee has already received said perimetry; perimetry kind judging means for judging whether or not said perimetry kind inputted from said input means is one different from past perimetry stored in said examinee measurement information; means to determine initial luminance for computing and determining an initial luminance of a stimulus in a visual field coordinate system which correspond to said perimetry to be conducted from now on so as to have a value equal to or close to a sensitivity which is shown in a sensitivity distribution data of said past perimetry on the basis of said sensitivity distribution data of said past perimetry if judgment is that said perimetry kind which has been inputted from said input means is one different from said past perimetry kind which is stored in said examinee measurement information; and perimetry execution means for starting said perimetry with said initial luminance which has determined by said means to determine initial luminance as said initial luminance of said stimulus.