Vision Screener
OwnerDavid JOHNSinventor
Life of this patent
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Abstract
An article and method for screening vision are described that does not require verbal input from a test person or the test person to maintain a fixed position during the screening. The article includes an image capture device, at least one test light, a processing unit that includes an interpretive program, and a display. The method comprises capturing an image of a person's eyes, verifying the image, studying the image, evaluating the image, and displaying the results. Conveniently, the article and method require no special training by an operator.
Claims23
A method of vision screening a person's eyes including a right eye and a left eye, the method comprising:
- a) Capturing at least one image of the person's eyes;
- b) Verifying the image;
- c) Studying the image for vision parameters;
- and
- d) Evaluating the vision parameters to determine a test result.
A method of vision screening a person's eyes including a right eye and a left eye, the method comprising:
- a. Detecting the person's eyes at a focal region;
- b. Illuminating the person's eyes with an off-axis test light of sufficient luminosity to produce photorefraction;
- c. Capturing an image of the person's eyes with an image capture device;
- d. Transferring the image to a processing unit.
- e. Verifying the image with the processing unit by identifying at least one attribute each for the right eye and the left eye and ensuring the attribute is within a specification, the attribute being selected from a group consisting of a retinal reflex diameter, X- and Y-coordinates of the retinal reflex, X- and Y-coordinates of a corneal reflection, and combinations thereof;
- f. Studying the image for vision parameters by identifying for each eye (i) X- and Y-coordinates of centers of the corneal reflection and (ii) a horizontal mid-line through a center of a pupil of each eye based on the X- and Y-coordinates;
- g. Using an inference engine to evaluate the vision parameters against a database to determine a test result;
- and
- h. Displaying the test result.
An article for the screening a person's eyes comprising:
- a. An image capture device for capturing an image of the person's eyes at a focal region;
- b. A test light for illuminating the person's eyes at the focal region;
- c. A processing unit for verifying, studying, and evaluating the image;
- and
- d. A display for displaying a test result of the screening.
Dependencies are inferred from the claim text.