I panic when someone asks me what time it is. I have an analogue watch so the picture flips back and forth. Is it 10.55 am or is is 1.05 pm? Have I had lunch yet? No, so it must be 10.55 am. Or I know that my watch is on my left hand, so the left side of the dial, near my wrist, is the numbers from 7 to 12, the side of the dial near my hand is the right side, number 1 to 5. etc People look at me like I'm stupid because I can't tell them the time. A simple answer to a simple question. Sometimes I just show them my watch and let them decipher it.

Digital clocks are the pits. Those digital numbers! 2's look like 5's. What hope have I got of deciphering that?

Do Roman numerals work any better for you?

IX and XI are going to be liabilities for flipping, but you've got the context of their position on the dial to help - and the Romans seem to have invented IIII just because of this sort of visual processing problem.