Method and apparatus for central visual field mapping and optimization of image presentation based upon mapped parameters
AssigneeStephen H. Sinclair
InventorsStephen H. Sinclair, Jonathan Nissanov, Amitabba Gupta
Life of this patent
Estimating the term…
Abstract
A method and apparatus for testing individuals having a sub-optimal central field of vision so as to identify areas within the visual field in which images can be perceived and for determining effects of contrast sensitivity and distortion within such areas such that visual images may be presented, after being enhanced so as to modify the images in accordance with tested parameters, so that the individual will perceive the images in an improved manner.
Claims21
A method for optimizing the presentation of visual information to a person having a sub-optimal central field of vision comprising the steps of:
- A. Determining the geometry of the person's central visual field with regard to perception of high contrast images;
- B. Measuring parameters representative of contrast sensitivity of the person at a plurality of locations within the determined central visual field;
- C. Measuring parameters representative of luminance sensitivity at a plurality of locations in the determined central visual field;
- D. Measuring parameters representative of perceived spatial distortion of locations within the determined central visual field;
- E. Modifying and enhancing the visual information in accordance with the measured parameters to create individualized visual information;
- F. Presenting the individualized visual information to the person's functional areas of the central visual field.
A method for testing a person having a reduced central field of vision comprising the steps of:
- A. Determining the person's functional visual field in which high contrast images are perceived including randomly displaying an image at a plurality of points of intercept on a display screen eccentric to a fixation target with the image randomly appearing at different orientations, and recording orientations perceived by the person;
- B. Measuring parameters of the contrast sensitivity of the individual within the functional visual field by randomly displaying an image at predetermined visual field intercepts on the display screen and wherein the contrast and orientation of the image with respect to the display screen is randomly changed and wherein the person indicates perception of orientation each time an image is perceived on the display screen;
- and
- C. Measuring parameters for distortion of images in the functional visual field in which a plurality of spaced horizontal and vertical distorted lines are presented on the display screen, and the person rearranging the lines where the lines appear to be distorted to thereby determine distortions within the person's functional visual field.
An apparatus for testing a person having poor central field vision so as to determine functional visual fields for receiving images comprising;
- a computer means, a display monitor connected to said computer means said computer means, being operable to display a fixation target on said display monitor and to randomly display images on said display screen in eccentric relationship to said fixation target in random orientation, and to display images in a pattern on said screen wherein said images are randomly oriented, and to display a plurality of horizontal and vertical lines on said screen, and means responsive to a person's recognition of the images and lines on said screen for recording the person's perception of said images.
Dependencies are inferred from the claim text.