No good data
This is not quite rare, but also not common.
It is more often reported in children
but can occur at any age. It is not a mental illness, but a physical perceptual distortion and is usually not part of a dangerous condition. It may be associated w/ migraines or tle and a neurologist might help. Try not to worry about 'craziness' - it is not that. Wish i could offer #s, but i can't.