Contour integration perimetry vision test
One aspect of the disclosure includes a method to assess vision function. In one embodiment, the method comprises providing a sequence of test images on a display ( 106 ) to a test subject ( 102 ) during a stimulus interval and providing a response pattern image for each of the sequence of test images during a response interval after the stimulus interval. Each of the sequence of test images includes multiple stimulus patterns ( 304, 306 ) arranged around a fixation target ( 302 ). The response pattern image includes multiple response targets ( 320 ), each of which corresponds to a location of each of the multiple stimulus patterns ( 304, 306 ). One ( 304 ) of the multiple stimulus patterns ( 304, 306 ) differs. An assessment of a vision function of the test subject ( 102 ) is based on a selection by the test subject of one of the multiple response targets ( 320 ) that the test subject indicates corresponds to a location of the multiple stimulus pattern that differs ( 304 ). A corresponding vision testing system ( 100 ) is disclosed as well.
1. A method to assess vision function, comprising:
providing a sequence of test images on a display to a test subject, said display coupled to a computer, during a stimulus interval; and
providing a response pattern image on said display to said test subject for each of said sequence of test images during a response interval after said stimulus interval;
wherein:
each of said sequence of test images includes multiple stimulus patterns arranged around a fixation target;
said response pattern image includes multiple response targets, each of which corresponds to a location of each of said multiple stimulus patterns;
at least one of said multiple stimulus patterns differs from others of said multiple stimulus patterns; and
an assessment of a vision function of said test subject is based at least partially on a selection by said test subject during said response interval, for each of said sequence of test images, of at least one of said multiple response targets of said response pattern image that said test subject indicates corresponds to a location of said at least one of said multiple stimulus patterns that differs from others of said multiple stimulus patterns.
2. The method of claim 1 , wherein each of said multiple stimulus patterns include contours with a cross-sectional luminance modulation.
3. The method of claim 2 , wherein said cross-sectional luminance modulation includes a central bright region, surrounding dark regions on each side of said central bright region, and outer light regions on outer sides of said surrounding dark regions.
4. The method of claim 1 , wherein said others of said stimulus patterns are a smooth arc.
5. The method of claim 1 , wherein said at least one of said multiple stimulus patterns is a modulated arc.
6. The method of claim 5 , wherein a modulation amplitude of said modulated arc can vary.
7. The method of claim 1 , wherein said at least one of said multiple stimulus patterns can be in any quadrant around said fixation point.
8. The method of claim 1 , wherein said stimulus interval is typically less than about 250 milliseconds.
9. The method of claim 1 , wherein a radius from said fixation target to said multiple stimulus patterns can vary.
10. The method of claim 1 , wherein a number of the multiple stimulus patterns can vary.
11. A vision testing system, comprising:
a display;
a computer coupled to said display and configured to display to a test subject:
a sequence of test images during a stimulus interval; and
a response pattern image for each of said sequence of test images during a response interval after said stimulus interval;
wherein:
each of said sequence of test images includes multiple stimulus patterns arranged around a fixation target;
said response pattern image includes multiple response targets, each of which corresponds to a location of each of said multiple stimulus patterns;
at least one of said multiple stimulus patterns differs from others of said multiple stimulus patterns; and
an assessment of a vision function of said test subject is based at least partially on a selection by said test subject during said response interval, for each of said sequence of test images, of at least one of said response patterns of said response pattern image that said test subject indicates corresponds to a location of said at least one of said multiple stimulus patterns that differs from others of said multiple stimulus patterns.
12. The vision testing system of claim 11 , wherein each of said multiple stimulus patterns include contours with a cross-sectional luminance modulation.
13. The vision testing system of claim 12 , wherein said cross-sectional luminance modulation includes a central bright region, surrounding dark regions on each side of said central bright region, and outer light regions on outer sides of said surrounding dark regions.
14. The vision testing system of claim 11 , wherein each of said others of said stimulus patterns is a smooth arc.
15. The vision testing system of claim 11 , wherein said at least one of said multiple stimulus patterns is a modulated arc.
16. The vision testing system of claim 15 , wherein a modulation amplitude of said modulated arc can vary.
17. The vision testing system of claim 15 , wherein an arc length of said multiple stimulus patterns can vary.
18. The vision testing system of claim 11 , wherein said stimulus interval is typically less than about 250 milliseconds.
19. The vision testing system of claim 11 , wherein said stimulus patterns can be greyscale or color.
20. The vision testing system of claim 11 , wherein a background for said multiple stimulus patterns can be greyscale or color.