College of Psychology: Faculty Articles

Title

Astereopsis Caused by Traumatic Brain Injury

Document Type

Article

Publication Date

8-1999

Publication Title

Archives of Clinical Neuropsychology

ISSN

0887-6177

Volume

14

Issue/No.

6

Abstract

Impaired depth perception (astereopsis) has been observed in a variety of cerebral pathologies affecting the posterior parietal lobe. In the current study of 93 consecutive head trauma admissions, 24% had complete astereopsis and 41% performed more than 2 SDs below the orthopedic control group mean. Degree of impairment was related to Glascow Coma Scale score, length of posttraumatic amnesia, reduced visuospatial and memory abilities, and the presence of intracranial pathology of the parietal lobes. Impairment was also related to trauma severity in patients without any visualized intracranial pathology, presumably due to diffuse axonal shearing. Clinically meaningful impairment was observed in 25% of this group; 10% had complete astereopsis. Stereoacuity screening requires 1 to 2 minutes. Undetected astereopsis may increase risk for subsequent motor vehicle accidents or falls.

DOI

10.1016/S0887-6177(98)00048-1

Peer Reviewed

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