During fall foliage season, most of us have a big blind spot: People with colorblindness can’t see the autumnal splendor. There are 13 million Americans afflicted with the condition. Tennessee (which has “see” right there in its name) fixed this. The state installed “colorblindless” viewers at a few major attractions in the mountainous eastern part of the state. The lenses correct the view for those with colorblindness, letting them see the full blaze of amber and crimson hues leaf-peepers have been taking for granted all this time. The first visitors cried when they used the machines—and so will you when you watch these videos. Their emotions need no filter.