Oh yaa, Love at first sight exist,
Life me koi to hota hai jo sirf apne liye is duniya me aaya hai, aur wo agar samne aa jaye to it is possible,,,,waise bhi life bahot badi hai, kuch bhi ho sakta hai
but my opinion is that
"Aap itne bhi achche mat bano ki koi aapse Pyar karne ki Galti kar baithe"

It definitely does!

YES IT DOES EXIST AND VERY MUCH EXIST. THERE ARE WAVES WHICH TRANSMIT BETWEEN INDIVIDULALS . THE HEART STARTS PUMPING MORE VIGOUROUSLY. THE EYES DO THE TALKING. THE ALMIGHTY ARRANGES TWO SOULS TO MEET IN MOST OF THE CASES WHERE LOVE BEGINS AT FIRST SIGHT.

There are many kinds of love. I love my parents , i love my friends , i love my family and bro and sis. i even love those i work with ~ But i don't love any of them just the same.
I think love starts as a visual and will grow to more, if we want it to.

To love someone is easy. i can go anywhere they are and do anything they are doing.. To not like someone is work and people would have to watch everything they did or said..

To answer question as you imply ~ "Does Love At First Sight Exist" ~ I believe "Yes It Can."