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Michael May lost his sight when he was a kid, and only had it restored a couple years ago. While the operation was successful, May has had to work hard to learn how to see.

May finds it particularly difficult to interpret faces and facial expressions--during testing, he could only correctly identify a face as male or female 70 percent of the time, and expressions as happy, neutral or sad 61 percent of the time. In addition, seeing only the face of his own wife is still not enough for him to identify her, and he relies on clues such as hair length or gait to help him recognize people.

I bet his wife's a little relieved he can't recognize faces; he won't be disappointed by her looks.

Scientific American: Learning to See Requires More Than Just Eyesight