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Published on: November 20, 2015
Ophthalmic impairment at 7 years of age in children born very preterm
R W I Cooke1, L Foulder-Hughes, D Newsham
1Department of Child Health, University of Liverpool, Institute of Child Health, Royal Liverpool Children's Hospital, Liverpool, UK. mc19@liv.ac.uk
Insights
Very preterm infants show higher rates of vision problems, linked to developmental delays. These ophthalmic impairments in children born prematurely may stem from generalized brain development issues.
Area of Science:
- Ophthalmology
- Developmental Pediatrics
- Neuroscience
Background:
- Preterm birth is a significant risk factor for various developmental issues.
- Ophthalmic impairments can impact a child's overall development and quality of life.
- Understanding the link between prematurity and vision is crucial for early intervention.
Purpose of the Study:
- To assess the prevalence of ophthalmic impairments in very preterm infants compared to term infants.
- To investigate the relationship between these impairments and brain ultrasound findings and retinopathy.
- To correlate ophthalmic issues with visual perception, motor skills, and cognitive abilities.
Main Methods:
- A cohort of 279 very preterm children and 210 term-born controls were assessed at age 7.
- Ophthalmic assessments included visual acuity, stereopsis, and contrast sensitivity.
- Cognitive and motor functions were evaluated using standardized tests, with perinatal data reviewed.
Main Results:
- Preterm children had significantly higher rates of needing glasses, poor visual acuity, reduced stereopsis, and strabismus.
- Ophthalmic impairments correlated with lower scores in motor and cognitive tests.
- Retinopathy (Stage 3) was associated with poorer visual acuity, but impairments were not linked to cerebral ultrasound findings.
Conclusions:
- Children born very preterm have an increased prevalence of ophthalmic impairments at primary school age, even without major neurodevelopmental issues.
- These impairments are associated with deficits in visual perception, motor skills, and cognition.
- A generalized abnormality in cortical development is suggested as the cause, rather than focal brain lesions.
Aims:
To determine the prevalence of ophthalmic impairments in very preterm compared with term infants, the relation between impairments and cerebral ultrasound appearances and retinopathy, and the correlation with visual perception and motor and cognitive measures.
Subjects:
279 children at 7 years of age born before 32 weeks gestation within Liverpool during 1991-92 and attending mainstream schools, and 210 term controls.
Methods:
Visual acuity was assessed by Snellen chart, and strabismus by the cover test. Stereopsis was determined using the TNO random dot test, and contrast sensitivity using the Cambridge low contrast gratings. Visual and motor abilities were assessed using the Developmental test of motor integration (VMI) and the Movement ABC. Intelligence was measured with the Wechsler intelligence scale for children UK. Perinatal cranial ultrasound and retinopathy data were extracted from clinical records.
Results:
Children born preterm were significantly more likely to wear glasses, to have poor visual acuity, reduced stereopsis, and strabismus than term controls, but they showed no significant decrease in contrast sensitivity. Ophthalmic impairments were significantly related to poorer scores on the VMI, Movement ABC, and Wechsler IQ tests, but were not significantly related to neonatal cranial ultrasound appearances. Stage 3 retinopathy was related to poorer subsequent acuity.
Conclusions:
Children born very preterm and without major neurodevelopmental sequelae have an increased prevalence of ophthalmic impairments at primary school age which are associated with visual perceptional, motor, and cognitive defects. The cause may be a generalised abnormality of cortical development rather than perinatally acquired focal lesions of the brain.
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