ophthalmologisches diagnosis method and device.

摘要

Disclosed is an ophthalomological diagnosis method and apparatus in which a blood vessel (61, 68) in the eye fundus (18b) is illuminated with a laser beam (60, 60 min ) of a predetermined beam spot whose diameter is substantially equal to or smaller than that of the blood vessel in order to produce a speckle pattern (63) which is produced by light scattered from the eye fundus. Boiling movement of the speckle pattern thus produced is then detected through an aperture pattern (42, 65) comprised of a plurality of small apertures (65 min ) as fluctuation in a total amount of light passing through the small apertures to obtain a speckle signal which is evaluated to measure velocity of the blood flowing through the blood vessel concerned. This arrangement makes it possible to detect the speckle signal without any averaging process with an increase in intensity detected, thus enabling advantageous and successful measurement of the blood flow state in the eye fundus.