Abstract: A method is presented to address quantitative assessment of visual motor response in a subject, where the method comprises the steps of: (1) presenting at least one scene to a subject on a display; (2) modulating the contrast of a predetermined section of the scene; (3) moving the predetermined section relative to the scene with the movement being tracked by the subject via at least one input device; (4) measuring a kinematic parameter of the tracked movement; (5) quantitatively refining the tracked movement; (6) determining the relationship between at least one of the scene and the quantitatively refined tracked movement; (7) adjusting the modulated contrast relative to the quantitatively refined tracked movement; (8) calculating a critical threshold parameter for the subject; and (9) recording a critical threshold parameter onto a tangible computer readable medium.

Abstract: A method is presented to address quantitative assessment of word recognition sensitivity of a subject, where the method comprises the steps of: (1) presenting at least one scene, comprising a plurality of letters and a background, to a subject on a display; (2) moving the plurality of letters relative to the scene; (3) receiving feedback from the subject via at least one; (4) quantitatively refining the received feedback; (5) modulating the saliency of the plurality of letters relative to accuracy of the quantitatively refined feedback; (6) calculating a critical threshold parameter; and (7) recording a critical threshold parameter onto a tangible computer readable medium. An apparatus for quantitative assessment of word recognition sensitivity of a subject comprising a display device, an input device, a control device, and a tangible computer readable medium.

Abstract: A method is presented to address quantitative assessment of verbal memory of 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 symbols and a background; (2) moving the plurality of symbols relative to the scene, the movement being tracked by the subject via at least one input device; (3) adjusting the saliency of the plurality of symbols relative to the tracked movement; (4) receiving feedback from the subject via said input device; (5) quantitatively refining the received feedback; (6) modulating the movement of the plurality of symbols relative to the accuracy of the quantitatively refined feedback; (7) calculating a critical threshold parameter; and (8) recording a critical threshold parameter onto a tangible computer readable medium. An apparatus for quantitative assessment of verbal memory of a subject comprising a display device, an input device, a control device, and a tangible computer readable medium.

Abstract: A method is presented to address quantitative assessment of functional impairment in a subject, where the method comprises the steps of: (1) presenting a plurality of tests to a subject on a display, the plurality of tests comprising a series of scenes, the scene comprising at least one stimulus, wherein the scene may be associated with visual, auditory, and tactile stimulus arrays; (2) modulating at least one spatial characteristic of at least one stimulus; (3) receiving feedback from the subject via at least one input device; (4) quantitatively refining the scene relative to the received feedback; (5) calculating the relationship between at least one of the scene, the stimulus, and the quantitatively refined scene; (6) adjusting the scene relative to the calculated relationship; (7) determining equilibrated scene parameter of the subject; (8) recording the equilibrated scene parameter onto a tangible computer readable medium; (9) generating at least one diagnosis to the functional impairment associated with

Abstract: A method is presented to address quantitative assessment of facial emotion nulling of a subject, where the method comprises the steps of: (1) presenting at least one scene, comprising a single facial expressions and a background, to a subject on a display; (2) adjusting the facial expression on the scene; (3) receiving feedback from the subject via at least one input device; (4) quantitatively refining the received feedback; (5) modulating the adjusted facial expression relative to the accuracy of the quantitatively refined feedback; (6) transforming the modulated facial expression; (7) calculating a critical threshold parameter; and (8) recording a critical threshold parameter onto a tangible computer readable medium. An apparatus for quantitative assessment of facial emotion nulling of a subject comprising a display device, an input device, a control device, and a tangible computer readable medium.

Abstract: A method is presented to address quantitative assessment of word identification latency of a subject, where the method comprises the steps of: (1) presenting at least one scene, comprising a plurality of letters and a background, to a subject on a display; (2) moving the plurality of letters relative to the scene; (3) receiving feedback from the subject via the input device; (4) quantitatively refining the received feedback; (5) modulating the movement of plurality of letters relative to accuracy of the quantitatively refined feedback; (6) calculating a critical threshold parameter; and (7) recording a critical threshold parameter onto a tangible computer readable medium. An apparatus for quantitative assessment of word identification latency of a subject comprising a display device, an input device, a control device, and a tangible computer readable medium.

Abstract: A method for assessing the navigational capacity in human subjects, and its use in diagnosing spatial disorientation in neurodegenerative diseases, such as, for example Alzheimer's disease. The method for assessing the navigational capacity includes conducting a spatial orientation test, recording the results of the test, analyzing the test results and making a determination of the navigational capacity of a human subject. In its most simple sense, navigational capacity includes the capacity not to get lost. The spatial orientation test includes various naturalistic navigation tasks that are each designed to assess specific areas of the navigational capacity of a subject.

Abstract: A mask assembly has two circumferential frames with an interior edge, an exterior edge and a lens. The assembly includes a skirt with a forward edge coupled to the frames. The forward edge extends rearwardly and terminates at a periphery positionable on the face of a wearer. A strap assembly includes a strap that is positionable around the head of a wearer. Free ends are secured to the vertical areas. The free ends of the strap are for securement and adjustment. A shield assembly has a front area that is positionable in front of the frames and lenses. The assembly has a peripheral ledge. An upper projection that extends from the shield. A finger extends adjacent to the horizontal area of the frame. Projections extend from the shield. Each has a finger extending upwardly. The projections and fingers are adapted to releasably couple the shield assembly to the mask assembly.

Abstract: A method for assessing the navigational capacity in human subjects, and its use in diagnosing spatial disorientation in neurodegenerative diseases, such as, for example Alzheimer's disease. The method for assessing the navigational capacity includes conducting a spatial orientation test, recording the results of the test, analyzing the test results and making a determination of the navigational capacity of a human subject. In its most simple sense, navigational capacity includes the capacity not to get lost. The spatial orientation test includes various naturalistic navigation tasks that are each designed to assess specific areas of the navigational capacity of a subject.

Abstract: The present invention relates to a method for diagnosing visuospatial disorientation or assessing visuospatial orientation capacity in a subject including conducting an optic flow test on the subject, recording results of the test, and comparing the results of the test against a threshold for optic flow perception.

Abstract: A blocking material composition, an essentially homogeneous mixture of(a) 80-90 weight percent of an ethylene derived hydrocarbon polymer having a molecular weight of 2600, a melting point of 51.degree. C. and a density of 0.79 g/cc at 93.degree. C.,(b) 10-15 weight percent of a thermoplastic, low molecular weight aliphatic hydrocarbon resin derived from mixed monomers of petroleum origin having a softening point of 98.degree.-102.degree. C., a specific gravity of 0.948 at 25.degree. C., an acid number <1, a molecular weight of 1985 and(c) 1-3 weight percent of an ethylene/vinyl acetate copolymer having a vinyl acetate content of 18 percent by weight, a melt index of 150 g/10 min, a density of 937 g/cm.sup.3 at 23.degree. C. and a softening point, ring and ball, of 99.degree. C. Also disclosed is a lens block of the blocking material and method for securing an ophthalmic lens to one surface of a lens block by applying to one surface of said lens block a molten blocking material composition.