Can you read the top line?
In a real vision test, no. And it is not always the same letter, I have seen/not seen K, R, S etc.
When they measured my glasses at NAMI for the whammy they said my glasses were over the limit for SNFO by a little bit (I would not worry about the limit too much, my eyes are really bad
). They 'tweaked' my prescription to just under the limit (they said it was not uncommon) and I passed with them on with 20/20 vision.....and then never wore them again. I have always used my civilian glasses/contacts.