Patent ID: 6347242
Filing Date: 2002-02-12
Classification: A61B

Abstract:
An apparatus for measuring choroidal blood flow non-invasively and simultaneously in each eye of a subject comprising:a light source for providing illumination of each eye of the subject over a specific range of frequencies: a light filter means for bandpass filtering of the illumination from said light source; a plurality of eyepieces each containing recessed contact lens means for directing the filtered illumination to the choroid and retina of each eye; a plurality of bifurcated fiber optic cable means each having an input end, an output end and a common end, the input end optically connected to the light source and the common end connected to the eyepiece; a plurality of photodector means each optically connected to the output end of said bifurcated fiber optic cable means for detecting light signals reflected from the choroid and retina of each eye and which converts said detected light signals into electrical signals; a plurality of filter means for filtering out said electrical signals which are outside said specific range of frequencies and producing a filtered output; a plurality of amplifier means for amplifying said filtered output; recorder means for simultaneously recording each amplified filtered output; processor means for comparing the amplified filtered outputs and graphically displaying derived outputs which are sensitive to differences between the amplified filter outputs; and an auto-injection system for the introduction of an absorptive dye into the venous system at a uniform speed.