Abstract: A method for optical imaging of retinal function comprises an illuminating observing step (S1) of illuminating the retinal region (2) of the rear surface of an eyeball (1) including the macular area and the optic disk with an invisible light (3) and observing the retinal region (2), a stimulating step (S3) of illuminating the retinal region (2) with a visible flash light (4) to stimulate a retinal function including an optic disk's function, an imaging step (S2) of capturing images (A, B) before and after the stimulation of the retinal region (2) illuminated with the invisible light, and a calculating step (S4) of detecting the change of the retinal function of the retinal region from the images (A, B) before and after the stimulation. In the calculating step, the images (A, B) before and after the stimulation are registered in advance, and the change of the retinal function of the retinal region is displayed with an image from the registered images.

Abstract: A method for optical imaging of retinal function comprises an illuminating observing step (S1) of illuminating the retinal region (2) of the rear surface of an eyeball (1) including the macular area and the optic disk with an invisible light (3) and observing the retinal region (2), a stimulating step (S3) of illuminating the retinal region (2) with a visible flash light (4) to stimulate a retinal function including an optic disk's function, an imaging step (S2) of capturing images (A, B) before and after the stimulation of the retinal region (2) illuminated with the invisible light, and a calculating step (S4) of detecting the change of the retinal function of the retinal region from the images (A, B) before and after the stimulation. In the calculating step, the images (A, B) before and after the stimulation are registered in advance, and the change of the retinal function of the retinal region is displayed with an image from the registered images.

Abstract: A living body function measurement method comprises separating a light from a low coherence light source into a signal light and a reference light, modulating a frequency of at least one of the signal light and the reference light, irradiating the signal light to an observation area of a living body sample, giving a stimulation to the living body sample from an outside of the living body sample, synthesizing the signal light via the observation area and the reference light and detecting a heterodyne interference signal, and measuring a living body function of the observation area by measuring a change in the heterodyne interference signal when the stimulation is changed.

Abstract: In a brain activity measuring apparatus, the reflected light from the brain surface is conducted by way of an objective lens and focusing lens and split into two beams by a beam splitter. The light beams are conducted through respective band-pass filters having different transmission wavelengths, and received by CCD cameras in which images are formed from the filtered light beams. The CCD cameras produce signals of the images, and a differential amplifier subtracts one image signal from the other thereby to remove a background noise component. The apparatus is free from noises caused by mechanical vibration, and the resulting differential signal exhibits the brain activity accurately.