Patent ID: 7377646

Claim:
A perimeter for examining a state of a visual field of a patient's eye, the perimeter comprising: a target presenting unit that presents a stimulation target for examination to the eye, a presentation position and a presentation brightness of the target being variable; a response unit that provides a response indicating that the patient recognizes the target presented by the target presenting unit; a first arithmetic unit that obtains a threshold of sensitivity at each examination point on a retina of the eye corresponding to each presentation position based on the response provided by the response unit and the presentation brightness at each examination point; an input unit that inputs function information at each examination point, the function information at each examination point being objectively obtained by processing a first fundus image of the eye taken before irradiation of visible stimulation light onto a fundus of the eye and a second fundus image of the eye taken after the irradiation of the visible stimulation light; and a determining unit that determines an initial reference value of the presentation brightness at each presentation position based on the input function information at each examination point.