Health
Why the eye doctor keeps asking one or two
HERE’S THE INTERESTING PART
The massive, intimidating machine that swings in front of your face during an exam looks like a prop from a sci-fi movie. Known as a phoropter, this heavy mechanical mask contains hundreds of intricate internal lenses. The professional clicks through them rapidly, repeatedly asking 'one or two' until you eventually start doubting your own reality and just pick randomly to make it stop.
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