H.W.
I don't live in your area, but may I suggest checking through your insurance carrier? Or, talk to your pediatrician-- it may be that even if you don't have vision coverage, it could be referred as a 'medical' visit and they'll refer you to someone who does well with children.
Just trying to save you some money-- we did a vision exam for our son a month ago and had to suss this stuff out.
Good luck.