Russian Eye Test?

Hard enough but when they put the letters the wrong way around they really do mean to test your eye/brain co-ordination.
Thankfully, as everyone knows, when you get in there you are reading the letters via a mirror so it all works out in the end. As did my eye test, such a tiny difference in prescription that it was unnecessary to get new spectacles, and my eyes are healthy after peripheral and optical nerve checks. 
Don't you just hate that bit when they blow in your eyes? A machine would be bad enough but when the optician assistants have to do it that is even worse (Joking, honest, TESCO aren't that cheapskate!).