Why do some people say letting a baby look at themselves in a mirror is bad?

Never heard of that! My baby lives Mirrors and cameras :p

my grandmother said it will make them go cross eyed

it's a superstition.. lol some older people say spirits can enter them through a mirror or something like that lol

?????

i never heard that before... how is it bad but they put mirrors on bouncers & swings & toys... hmm.. ? i wanna know too