> if we implanted (with a futuristic tech) cones that can see ultraviolet? The information also needs to make it from the retina to the brain. Surprisingly, th

> if we implanted (with a futuristic tech) cones that can see ultraviolet? The information also needs to make it from the retina to the brain. Surprisingly, there are no separate red/green/blue channels for the different cone types. Instead, there is a channel for the difference between red vs green, and another for the difference between between blue vs (red+green). https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2826135/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2826135/ So adding a new cone type would not be enough, it would also have to be represented in one of these channels, or a new channel.