If you absolutely can't see black and blue then it's because your cones aren't dilating, which means you can't see as well in low-light. I see it black and blue unless I've just come in from spending time in a brighter room.
If you absolutely can't see black and blue then it's because your cones aren't dilating, which means you can't see as well in low-light. I see it black and blue unless I've just come in from spending time in a brighter room.
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