hmmmm, idk bro...
i use three different kinds of drops...

one for contacts
one for red eyes
one for ...hmm idk found a little bottle in my truck =/

i dont seem to have dialation though
but at one of my eye checks they use drops to dialate your eyes
and then if u ask they put other drops in to un dialate them (like if u have to drive home)....
have not seen anything on the selves for this though

ask a pharmacist at like a pharmacy maybe they know......