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Roller Coaster Greyout

amaurosis fugax 9:27 PM
Have you ever been on a roller coaster where you experienced gradual dimming of your vision?  This phenomenon actually has a name:  the greyout.  While many people find this visual experience to cause nausea and severe discomfort, there are a large group of thrillseekers out there just looking for their next greyout experience.  Let's breakdown what the greyout really is: King's Dominion Intimidator...