That, i would say, depands on how specific you are about the question " Do you believe in love at first sight ? ".
- If you ask, is "Can there be an extrem deep emotion, the very second you see a person that you find attractive by look (because you dont know the soul), than absolutely yes.
Of course your brain is reacting on a person that fits into your profile of what is beautiful, and can give you an amazing push of sympathy (or call it love if you want).
But this can be splited up again in many different ways.
We can feel sympathy (or love..) for someone, going just by the look.
We can feel sympathy for just someones soul.
But there are even way more options to feel that, than just those i mentioned.
In my opinion i would realy just go that far and say " It is LOVE " if both of these conditions are there.
So if i fall for the soul AND the look (and of course other components) of this person, than yes it is love.
But still, it is not Love at first sight.
Simply , because as even others mentioned before me, it just takes time.
I cant fall for someones soul after one single communication based on " Hy, how are you ? ".
So that just leads me to the answer NO, there is no love at first sight ( in my opinion).