Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type
Patent
1998-10-15
2000-07-18
Manuel, George
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Objective type
A61B 310
Patent
active
060897155
ABSTRACT:
A system and method for locating and modeling eyes in imagery for automated photorefractive screening. The invention includes a digital camera having a lens-mounted flash for obtaining a digital image of the face of an individual, and a suitably programmed processor, such as a general purpose digital computer, for locating an eye of the individual in the digital image, modeling structures in the eye, analyzing the digitized eyes of the individual for eye disease, and providing a recommendation for treatment. In one aspect, the invention includes a system and method for locating a patient's eyes in a digital image that includes each eye as illuminated by a near-axis flash, including automatically finding light reflexes in the digital images as indicative of the location of each eye. Automatically finding light reflexes includes analyzing such light reflexes to determine possible pupil and sclera borders. The invention further includes automatically fitting a corresponding model to such possible pupil and sclera borders, analyzing the model of each eye to determine possible abnormalities in each eye; and outputting a possible diagnosis for each eye based on such analyzing. Other aspects of the invention include measuring retinal reflexes and corneal reflexes from the indicated eye models as an indicator of anomalies in the patient's eyes, and generating a digital image of each of a patient's eyes with a camera having a flash positioned near to a center line of a lens of the camera so as to generate images with bright, sharp light reflexes.
REFERENCES:
patent: 4950069 (1990-08-01), Hutchinson
patent: 5218387 (1993-06-01), Ueno et al.
patent: 5355895 (1994-10-01), Hay
patent: 5632282 (1997-05-01), Hay et al.
Bartsch Dirk-Uwe
Brody Barbara
Brown Stuart
Granet David
Hoover Adam
EyeDx, Inc.
Manuel George
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