Method and system for quantitative assessment of visual contrast sensitivity
A method is presented to address quantitative assessment of visual contrast sensitivity in a subject, where the method comprises the steps of: ( 1 ) presenting at least one scene to the subject on a display, the scene comprising a plurality of elements and a background; ( 2 ) modulating the contrast of at least one element; ( 3 ) receiving feedback from the subject via at least one input device; ( 4 ) quantitatively refining the received feedback relative to the scene; ( 5 ) adjusting the contrast relative to accuracy of the quantitatively refined feedback; ( 6 ) calculating a critical threshold parameter for the subject; and ( 7 ) recording a critical threshold parameter onto a tangible computer readable medium. An apparatus for quantitative assessment of visual contrast sensitivity of a subject comprising a display device, an input device, a control device, and a tangible computer readable medium. In its simplest sense, quantitative assessment profile of visual contrast sensitivity by psychophysical responses is generated on a tangible computer readable medium.
1. A method for assessment of visual contrast sensitivity of a subject, said method comprising the steps of:
presenting at least one scene to said subject on a display, said scene comprising a plurality of elements and a background;
modulating the contrast of at least one said element, said contrast being different from that of said background;
receiving feedback from said subject via at least one input device;
quantitatively refining said received feedback relative to said scene;
adjusting said contrast relative to accuracy of said quantitatively refined feedback;
calculating a critical threshold parameter for said subject; and
recording said critical threshold parameter onto a tangible computer readable medium.
2. The method of claim 1 , further comprising at least one of the additional steps of:
monitoring at least one response error from said subject; and
measuring said response error relative to a predetermined threshold.
3. The method of claim 1 , wherein said predetermined threshold further comprises an equal number of high luminance elements and low luminance elements.
4. The method of claim 1 , wherein said plurality of elements further comprises a plurality of contrast values.
5. The method of claim 1 , wherein said plurality of elements comprises at least one of the following:
plurality of circles; and
plurality of rectangles.
6. The method of claim 1 , wherein said modulated contrast is displaced higher than that of said background.
7. The method of claim 1 , wherein said modulated contrast is displaced lower than that of said background.
8. The method of claim 6 , wherein said displaced contrast is equally higher among said plurality of elements.
9. The method of claim 7 , wherein said displaced contrast is equally lower among said plurality of elements.
10. The method of claim 1 , wherein said adjusted contrast is displaced higher than that of said background.
11. The method of claim 1 , wherein said adjusted contrast is displaced lower than that of said background.
12. The method of claim 1 , wherein said quantitative refinement is associated with saliency.
13. The method of claim 1 , wherein said plurality of elements further comprises a plurality of colors.
14. The method of claim 1 , wherein said critical threshold parameter is implemented in a different functional impairment assessment test.
15. An apparatus for quantitative assessment of visual contrast sensitivity of a subject comprising:
a display for presenting at least one scene comprising a plurality of elements and a background;
an input device for tracking movement from said subject;
a control device, said control device capable of performing the following steps:
modulating the contrast of at least one said element, said contrast being different from that of said background;
receiving feedback from said subject via at least one input device;
quantitatively refining said received feedback relative to said scene;
adjusting said contrast relative to accuracy of said quantitatively refined feedback;
calculating a critical threshold parameter for said subject; and
recording said critical threshold parameter onto a tangible computer readable medium; and
a tangible computer readable medium for recording said critical threshold parameter.
16. The apparatus of claim 15 , wherein said display presents at least one contrast variation in said background.
17. The apparatus of claim 15 , wherein said display presents at least one contrast variation among said plurality of elements.
18. The apparatus of claim 15 , wherein said control device monitors at least one the response error from subject.
19. The apparatus of claim 15 , wherein said control device measures at least one response error relative to a predetermined threshold.
20. A tangible non-transitory computer readable medium, said tangible non-transitory computer readable medium containing instructions comprising the steps of:
presenting at least one scene to said subject on a display, said scene comprising a plurality of elements and a background;
modulating the contrast of at least one said element, said contrast being different from that of said background;
receiving feedback from said subject via at least one input device;
quantitatively refining said received feedback relative to said scene;
adjusting said contrast relative to accuracy of said quantitatively refined feedback; and
calculating a critical threshold parameter for said subject.