| visual function |
Vision..
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| visual hallucination |
The sensation of seeing objects that are not really there. This is a hallmark of alcohol and drug withdrawal and of other medical illnesses that adversely affect the brain.
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| visual imagery |
A mental concept of an object seen previously. SEE: afterimage.
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| visual line |
The line that extends from object to macula lutea passing through the nodal point. SYN: visual axis.
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| visual loss, functional |
A reduction in vision with no identifiable lesion of the visual pathways. It may be caused by an occult disease of the eye or of the optical centers in the brain. It may also occur in certain psychiatric disorders.
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