Abstract: A method for analyzing a retinal reflection that may be of less than optimum quality is disclosed. In the event an image of a retinal reflex taken by a retinal photometer is of low contrast or have certain other degradations, then matched filter tests applied to portions of the image containing the eyes may be performed in order to locate the retinal reflex. For determining potential eye abnormalities, a plurality of intensity shape determination tests may be performed, these including comparisons of the eyes against a center of gravity of the shape distribution, a least-squares fit and an analysis of the moments of Hu (of the retinal reflex) converted to Zernike polynomials. A Hirshberg deviation test is performed to determine if one or the other, or both, of the eyes are deviating. Intrasymmetry and intersymmetry of the reflex are analyzed to indicate cataracts, differences of optical power and other similar problems.

Abstract: A method for diagnosing a plurality of disorders of optical media of the eyes is disclosed. A beam of light is directed into eyes of a subject, and the retinal reflection, or reflex, emerging from the pupil is detected and analyzed. In some instances intensity levels of the reflex are compared against a reference reflex representative of a normal eye to isolate abnormal ocular conditions, and in other instances the subject's reflex is divided into portions and comparisons made between selected portions to isolate abnormal ocular conditions. Additionally, binocular status is evaluated by examining the eyes simultaneously.

Abstract: An ocular disease detection device is constructed having a defocusing mechanism that causes eyes of a subject to be defocused. This is primarily accomplished by providing a beamsplitter at a first focal distance from the eyes and projecting an image at a second focal distance to the beamsplitter and then to the eyes. This presents an image having two focal lengths therein to the subject, which defocuses the eyes. A beam generator and camera are mounted so that their respective axes are closely proximate each other and serve to illuminate and receive images of the defocused eyes via the beamsplitter, respectively.