An old misnagdishe Jew once went blind רח"ל. His wife, who was of Chasidic background, implored him to go to the Satmar Rebbe for a bracha. He emphatically refused. "I don't go to Rebbes". He was a true misnaged. They had tried all the doctors, he said, and there was nothing left to do.
His wife didn't let up and said that since he admits that the Satmar Rebbe is a big talmid chochom, he could at least go to speak to him in learning. The husband reluctantly complied.
He went to the Rebbe who told him to learn the Sefer Maor Einayim [the "Light Of The Eyes"] from the Holy Chernobler, as a segulah to restore his vision.. He found a chasidishe avreich and they learned together.
His vision was restored.
After he related this story he was asked if he learns Maor Einayim anymore. He answered "No".
A real misnaged:-).
[Heard from the person who heard it from the Baal Hamyse].
