From Perez Hilton (I diversify):

Fox News’ Glenn Beck revealed that he was diagnosed with macular dystrophy and could go blind within the next year.

“So, I went to the best doctor I could find – while I could still go the best doctor I could find.” [Sarah helpin’ you write your monologues?]

…Macular dystrophy is a rare genetic condition which can cause vision loss, causing patients to have difficulty driving, reading and identifying faces.

This may explain why Beck sees Hitler everywhere he turns. A bonafied medical condition. Layman’s term: Hitler-itis.
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