I don't think it exists. Lust or attraction at first sight, yes, but not love. You can't love someone if you know nothing about them.
The only way I think it might technically
be possible is if it's a person you've been having a long-distance relationship with and then finally get a chance to meet. Then you are seeing them for the first time, but since you have prior knowledge of them as a person, you know them and so you can love them. (But then you probably love them before even seeing them, so it might not count even then.)