Visual function in children with hemiplegia in the first years of life

Area of Science:

• Pediatric Neurology
• Ophthalmology
• Neuroscience

Background:

• Infantile hemiplegia, a form of cerebral palsy, often presents with neurological deficits.
• Visual function impairments are frequently observed in children with hemiplegia, but their incidence and relationship with brain lesions require further investigation.

Purpose of the Study:

• To determine the prevalence of visual function abnormalities in children with infantile hemiplegia.
• To explore the correlation between specific types of brain lesions (identified via MRI) and visual deficits in this population.

Main Methods:

• A cohort of 47 children with congenital or early acquired hemiplegic cerebral palsy underwent comprehensive visual function testing.
• Visual tests included grating acuity, visual field size, binocular optokinetic nystagmus (OKN), and ocular movements.
• Children were categorized into four groups based on MRI findings: brain malformations, periventricular white matter abnormalities, cortical-subcortical lesions, and non-progressive postnatal brain injuries.

Main Results:

• Over 80% of the children exhibited abnormalities in at least one visual function test.
• Visual acuity was the least affected function, while visual fields and OKN were abnormal in more than 50% of cases.
• No clear correlation was found between the type or timing of brain lesions and the pattern of visual dysfunction; visual field defects did not consistently map to contralateral damage in visual pathways.

Conclusions:

• Visual abnormalities are highly prevalent in children with infantile hemiplegia.
• Brain MRI findings do not reliably predict the presence or type of visual impairments.
• A thorough visual function assessment is crucial for all children diagnosed with hemiplegia.