Tangential: if you or someone you know is red-green color blind, just this week, we bought my dad a pair of EnChroma colorblind glasses and, at 69, he welled up

Tangential: if you or someone you know is red-green color blind, just this week, we bought my dad a pair of EnChroma colorblind glasses and, at 69, he welled up as he saw, for the first time, shades of green around him and saw red cars going down the road. Truly the greatest gift we could have gotten for him.