Patent ID: 8061840

Claim:
An ocular light stimulus apparatus in which the ocular fundus of an examinee's eye is irradiated with ocular fundus observation light to observe the ocular fundus and is irradiated with background light and stimulus light to locally stimulate the retina with the stimulus light and perform a biological examination using a bioelectrical signal obtained from the retina, the ocular light stimulus apparatus comprising: a ring slit disposed in a position substantially conjugate with the anterior ocular segment of the eye to be examined so that the ocular fundus of the eye to be examined is irradiated with the ocular fundus observation light via the ring slit; and a photographic stop disposed in a position substantially conjugate with the anterior ocular segment of the eye to be examined so that the ocular fundus of the eye to be examined is irradiated with the stimulus light and the background light via the photographic stop.