Patent ID: 8376956

Claim:
A device for determining color discrimination of a subject, the device comprising: a plurality of caps, each displaying a different hue, each said cap having a unique circuit which emits a response signal when energized by an energization signal corresponding to said unique circuit, each said unique circuit of a particular cap associated with said color of the particular cap, and the energization signal corresponding each unique circuit is different from the energization signal corresponding to each other unique circuit; a positioning tray having a plurality of positions, each position for receiving each one of the plurality of caps; an energizing circuit coupled to the positioning tray for individually generating the energization signal corresponding to each of the unique circuits for energizing the unique circuits of the plurality of caps; a detector coupled to the positioning tray for detecting whether a response signal has been emitted, and generating a detection signal for indicating the position of each of the plurality of caps based on said detecting; and a controller connected to the detector for recording the detected position of each energized cap wherein when the subject places the caps in positions of the tray according to their colors and when each cap is energized by energizing circuit, then the position of each cap in the positioning tray is indicated and recorded to indicate the color discrimination of the subject.