When discussing the concept of love at first sight on the most recent Stuff Mom Never Told You episode, Molly and I speak solely from the perspective of being able to actually see the object of attraction. But how might that instant magnetism change if you're blind? According to one blind man's account, it seems that 'love at first sight' then becomes 'love at first sound'.
"To answer the question simply and directly, blind people will tell you that it's the voice, brain and personality which initially catch the eye, or in this case, ear," Damon Rose wrote for BBC magazine.
In that way, Rose considers blind people at a slight advantage in the love department since it helps them avoid the common pitfall of skin-deep attraction that fizzles before it has a chance to mature.
Here's another interesting take on blindness and physical attraction from the Beautifully Blind blog:
So to answer the question in the post title, it seems that, yes, you don't need perfect vision to experience 'love at first sight' instant attraction. A lack of sight doesn't indicate a lack of any of the other hormonal influences that inexplicably draw us to certain people. Although, Rose in BBC magazine does note that then sighted people can apparently come around and ruin a perfectly good romance by informing blind people that their loves aren't exactly Brads and Angies.