Psychophysical evaluation of the effect of vitreous floaters
AssigneeAlcon Inc.
InventorsZsolt Bor, Alireza Malek Tabrizi
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Abstract
Particular embodiments disclosed herein enable psychophysical evaluation of vitreous floaters. One or more patient stimulus images are projected onto the patient's retina, the patient images including a stationary or mobile fixation target. While the patient stimulus images are displayed, images of the patient's retina are captured, such as using an SLO, and shadow images are derived from the images. The shadow images include representations of shadows cast by floaters. Observer stimulus images are generated from the shadow images and the patient stimulus images and projected onto the retinas of an observer, such as using a virtual reality display device.
Claims18
A method for characterizing floaters, comprising:
- receiving, by a computing device, one or more images of at least one of a patient's retinas, the one or more images captured while the at least one of the patient's retinas is stimulated with one or more patient stimulus images;
- identifying, by the computing device, one or more shaded regions in the one or more images to obtain one or more shadow images;
- and
- outputting, by the computing device, one or more observer stimulus images to a display device, the one or more observer stimulus images derived from the one or more shadow images and identical to a perception of the at least one of the patient's retinas of the one or more patient stimulus images.
A system for characterizing floaters comprising:
- a retinal imaging device;
- a display device;
- and
- a computing device configured to:
- receive one or more images of at least one of a patient's retinas from the retinal imaging device, the one or more images captured while the at least one of the patient's retinas is stimulated with one or more patient stimulus images;
- identify one or more shaded regions in the one or more images to obtain one or more shadow images;
- and
- output one or more observer stimulus images to the display device, the one or more observer stimulus images derived from the one or more shadow images and identical to a perception of the at least one of the patient's retinas of the one or more patient stimulus images.
Dependencies are inferred from the claim text.