Optical Disillusion
Since opticians use letter-like symbols to test our eyesight, you would expect them to recognise whether a letter is mounted correctly or incorrectly. Unfortunately, the shop is located in Kyoto, so it may take a while before I find out. Perhaps the optician broke the N when he dismantled it because he wanted to turn it the right way round?
Or maybe he uses an antique Snellen-Chart with an N that erratically has a serif at bottom left (3rd slide)?
Yes: Disillusion from Starship Trooper
All I know can be shown by your acceptance of the fact there shown before you.
Take what I say in a diff'rent way and it's easy to see
that this is all confusion.
Thank you Nadja @kycbkycb for bringing me this gem all the way from Japan :-)
@letterflip #Nrotated #NUpsideDown #UpsideDownLetters #RotatedLetters #Snellenchart