Colourblindness - A Few More Examples.

I remember, several years ago, being in a city where the traffic lights were shaped instead of all being round. Having a family with so many colourblind men in it, it immediately made sense to me. I wonder why this isn't standard in all cities since anywhere from in 1 in 12 to 1 in 20 men are colourblind? That's a lot of people. Enough to influence design. Here's an example of what traffic lights should look like.

And here are some more examples of how Luke (and many others) see the world. Flowers.  So sad!