Visual agnosia

Impaired recognition of visually presented objects not adequately explained by elementary visual loss or a general inability to respond. Testing other sensory routes and nonverbal knowledge helps locate the difficulty.

A visual-recognition disorder attributed to difficulty accessing meaning from a relatively adequate visual representation. Copying can provide evidence about perception, but line-by-line copying alone does not demonstrate normal integration.^[ref]

A visual-recognition disorder in which constructing or integrating an adequate perceptual representation is impaired. The specific perceptual demands must be established rather than inferred from recognition failure alone.