Vep-dynamic topography in children with cortical blindness

Abstract

Vep-dynamic topography (VDT) was performed on five cortically blind (CB) children, each with a different cause. CB children could be classified into three types according to the VDT findings: (1) the type without response, (2) the type with an abnormal response, and (3) the type with a normal response from the occipital area. On the brain CT, the first type corresponds with cases of defective occipital lobe cortex, the second with cases of incompletely damaged occipital lobe cortex and the third one with cases of normal occipital lobe cortex. VDT is very useful in evaluating the visual function of CB children which is often accompanied by complex brain lesions.

Key Words:

• cortically blind children
• VEP-dynamic topography
• brain CT
• visual cortex