I dunno the exact rules,
But Bex has a thing from birth, during development in the womb, parts of her eyes started to calcify, so she had her eyes moved to see round them, but the trade off is that she has one focus point, so can see fine at about 4 inches in front of her face, then from there it gets steadily blurry until about a foot where she can't see anything but splodges of colour.
( Windy Pig I'm naturally quite suspicious about the moon., Wed 20 Mar 2013, 13:58, 3 replies, latest was 12 years ago)

Wait, back up there...
She had her eyes moved??
( tangledupinblue hairy badge with moving eyes, Wed 20 Mar 2013, 13:59, Reply)

yeah,
Operations every year for about 10 years to move where the eyes pointed until they found a focus point good enough for her to be able to read.
( Windy Pig I'm naturally quite suspicious about the moon., Wed 20 Mar 2013, 14:03, Reply)

YOU'VE NOT TOLD HER YOU'RE GINGER
You monster.
( Two Hats 🎩🎩, Wed 20 Mar 2013, 13:59, Reply)

Does she even know you're black?

( Two Hats 🎩🎩, Wed 20 Mar 2013, 14:02, Reply)

it was a funny moment when the penny finally dropped that she couldn't see,

( Windy Pig I'm naturally quite suspicious about the moon., Wed 20 Mar 2013, 14:04, Reply)

that must suck, she sopunds like a fighter though

( Naked Ape call me Caitlyn, Wed 20 Mar 2013, 14:00, Reply)