There’s another one of those “EnChroma lenses help colorblind person see color for the first time” videos on YouTube, always touching. But this one is an R-rated version, with the man transformed from mild-mannered and a nervous to enthusiastically profane as he gets his first glimpse of sunset on the waterfront. “I’m shaking,” he says. “This is a lot different than what I thought it was going to be like.”

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