Multi-erroring

The furor has basically died down over the expense of my multi-focals. I had a odd few days wearing them. The first day I wore them, I noticed my shirt was inside-out while in the board room meeting with my boss. Then a couple of hours later a woman asked me to help her compose an e-mail to someone quite important and extremely wealthy.

She rang me quite worried.

"There's a typo in the e-mail you sent"

"No - can't be. I haven't had a typo in 20 years!"

But I looked at it and alas, there was a typo. I wrote the word "lo" instead of "no". I told her I was perhaps thinking in Hebrew as "lo" is actually "no" in Hebrew. But are my multi-focals causing me to multi-err?