Prenatal or Perinatal Injury? Diagnosing the Cortically Blind Infant

Area of Science:

• Neuroscience
• Pediatric Ophthalmology
• Developmental Neurology

Background:

• Cortical visual impairment (CVI) is a leading cause of childhood visual impairment.
• The etiology of CVI is often complex, with both prenatal and perinatal factors implicated.
• Understanding the timing and nature of brain injury is critical for diagnosis and management.

Observation:

• This study reviewed eight children with severe CVI and a history of perinatal events.
• Neuroimaging (MR imaging) and clinical data were analyzed to determine the timing of central nervous system (CNS) injury.
• Key outcome measures included perinatal history, visual and neurological findings, and MR imaging results.

Findings:

• MR imaging revealed signs of cortical dysgenesis and congenital brain malformations, such as polymicrogyria, indicating prenatal CNS injury.
• Subcortical white matter changes were frequently observed.
• Absence of watershed injury in the visual cortex suggested a prenatal origin of visual loss, potentially with secondary birth complications.

Implications:

• A history of perinatal distress in children with CVI may be nonspecific.
• Prenatal brain dysgenesis can contribute to CVI, highlighting the importance of neuroimaging.
• Identifying antecedent brain malformations and the timing of injury through neuroimaging is essential for accurate diagnosis and effective patient management.