True faith is blind. It is always based on something that we cannot see, but that we know is there. So, in the sense that blindness is an inability to see, then faith in God and all that He has revealed to us ultimately boils down to our having faith in the one that is taught to us through the book, does exist, but we cannot see Him. We can see the marvelous work of His creative abilities, but we can't see God. So ultimately one's faith in God is based on an inability to see the one in which your faith is placed. But don't worry. We will!!!!!
But yes, the term blind faith, as used by most as a retort, is a faith that seems unreasonable when the facts are considered. And so we say of people who believe such things that it is a blind faith.