word vision
Definition - The mental capability of understanding written symbols.

1. This differs from literacy in that you need word-vision capability to even attempt to become literate.

Oxford English Dictionary -
Its first citation is from 1899:
"Visual ideation, more particularly in reference to the association of written symbols with their meaning—that is, *word-vision—is specially impaired by lesion of the left angular gyrus."
(Allbutt's Syst. Med. VII. 313)

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