"Subjectively, we observed that, by looking at a particular color through both filters simultaneously (e.g. filter 1 over the left eye, filter 2 over the right)

"Subjectively, we observed that, by looking at a particular color through both filters simultaneously (e.g. filter 1 over the left eye, filter 2 over the right), a “meta-color” is observed, which appears to be different from the original perceived color and both individual filtered perceived colors. This meta-color is a manifestation of the “extra” effective cone type created by the pair of filters, and demonstrates the increased information relayed to the visual system resulting from the partitioning of the S cone."