To provide a perimeter that can objectively measure visual field capacity independent of a subjective answer of a subject.
This perimeter is comprised of a light emitter 1 that irradiates the subject with a laser La from a specified direction within his field of vision to give a light stimulus to a specified area on the retina r, a pupillometer 2 that measures the size of a pupil p after light is emitted by the light emitter 1, an index value calculation means 3 that calculates an index value of a pupil-to-light response based on changes in size of the pupil p measured by the pupillometer 2, a visual field capacity map creating device 4 that creates a visual field capacity map indicating, as a map, an area the subject can see without moving his head or eyes, an eyeball movement detecting device 5 that detects that the eye ball has moved during the measurement of the pupil-to-light response, and an abnormality alarm 6 that tells an operator a measurement of abnormality when the eyeball movement detecting device 5 detects that the eyeball has moved.
MURAKAMI SOJI
INAKAGATA SATORU
Atsuo Mori
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