Visual acuity in infants and children with Down syndrome

Area of Science:

• Ophthalmology
• Developmental Pediatrics
• Genetics

Background:

• Down syndrome (DS) is a genetic condition associated with various health issues, including visual impairments.
• Assessing visual acuity in infants and children is crucial for early intervention and management of visual deficits.

Purpose of the Study:

• To evaluate and compare the visual acuity development in infants and children with Down syndrome to that of typically developing children.
• To identify potential factors contributing to visual acuity deficits in individuals with Down syndrome.

Main Methods:

• The study involved 51 infants and children diagnosed with Down syndrome, aged two months to 18 years.
• Visual acuity was assessed using Teller acuity cards, with success rates and test times recorded.
• Participants were evaluated both with and without optical correction, and the presence of ocular disorders was noted.

Main Results:

• The success rate and test duration for visual acuity assessment in children with Down syndrome were comparable to those of normally developing children.
• Individuals with Down syndrome exhibited significantly poorer visual acuity compared to non-DS peers, even when corrected for refractive errors or ocular disorders.
• Visual acuity development in children with Down syndrome lagged behind their age-matched peers, particularly after six months of age.

Conclusions:

• Visual acuity development is significantly delayed in infants and children with Down syndrome.
• Neurological and optical factors likely contribute to the observed visual acuity deficits in this population.
• Early and ongoing monitoring of visual acuity is essential for children with Down syndrome to facilitate timely interventions.