Thai sign for the blind – but how on earth are they going to read it?

Thai netizens were struggling to understand the point of a sign for the blind that appeared in a building.
The sign said: “All blind people please hold the metal handrail throughout the building”.
The yellow sticker was posted online by “Kittisak Toppenstein Thowsombat” on Facebook.
There was no sign of braille to be seen.
Netizens conjectured that not all visually impaired people were totally blind.
And the sign might be for the able-sighted to help the visually impaired get about. EP