Visual agnosia is the inability of the brain to make sense of or make use of some part of otherwise normal visual stimulus an is typified by the inability to recognize familiar objects or faces. This is distinct from blindness, which is a lack of sensory input to the brain due to damage to the eye or optic nerve. Visual agnosia is often due to damage, such as stroke, in posterior occipital and/or temporal lobe(s) in the brain.