Perimetric measurement apparatus for measuring characteristics of X ganglion cells

摘要

An apparatus for measuring a visual field of a patient, especially characteristics of X ganglion cells, displays a series of targets to a patient. A ramp stimulus is used to measure characteristics of X ganglion cells. A target size setting device sets targets of various sizes. A stimulus intensity changing device changes the intensity of the stimulus in accordance with the size set by the target size setting device. A response device measures the response from the patient, that is, whether the patient senses the target. A memory stores the intensity of stimulus and target size corresponding to the patient's responses.