Scientists are looking at direct delivery of gene therapy to retinal cells to cure serious eye diseases like macular degeneration, pigmentosa blindness, etc. Should this work well, then the next step would be lesser conditions like male color blindness. I read of some successful attempts to give dicromatic animals, genrally carnovoires, the trichromatic gene directly to the retina. These subjects can be tested by giving rewards hidden in standard color blindess test images.<p>The next step, more controversial, would be super-vision of tetrachromacity, perhaps infra-red and ultra-violet sensitivity. Night vision glasses no longer needed for enhanced soldiers.