1. at first sight - Adverb
2. at first sight - Phrase
after an initial impression, which later proves incorrect
on first seeing (someone or something); immediately
Source: WordNetThe advantage of love at first sight is that it delays a second sight. Natalie Clifford Barney
Nothing seems at first sight less important than the outward form of human actions, yet there is nothing upon which men set more store: they grow used to everything except to living in a society which has not their own manners. Alexis de Tocqueville
He fell in love with himself at first sight and it is a passion to which he has always remained faithful. Anthony Powell
A commodity appears at first sight an extremely obvious, trivial thing. But its analysis brings out that it is a very strange thing, abounding in metaphysical subtleties and theological niceties. Karl Marx
A stunning first impression was not the same thing as love at first sight. But surely it was an invitation to consider the matter. Lois McMaster Bujold
I believe in love at first sight. You want that connection, and then you want some problems. Keanu Reeves