Related Experiment Video
Updated: Aug 13, 2026

Assessment and Evaluation of the High Risk Neonate: The NICU Network Neurobehavioral Scale
Published on: August 25, 2014
Risk factors for strabismus in children born before 32 weeks' gestation
P M Pennefather1, M P Clarke, N P Strong
1Department of Ophthalmology, Royal Victoria Infirmary, Newcastle upon Tyne.
Insights
Premature infants with cicatricial retinopathy of prematurity, refractive error, family history, or poor neurodevelopment are at higher risk for strabismus. These findings aid in managing premature children and future strabismus etiology research.
Area of Science:
- Ophthalmology
- Pediatrics
- Neonatology
Background:
- Strabismus is a common ocular misalignment.
- Premature birth is a known risk factor for various developmental issues, including visual impairments.
Purpose of the Study:
- To identify independent risk factors for strabismus in children born prematurely.
- To inform management strategies and future research on strabismus etiology.
Main Methods:
- Prospective study of children born before 32 weeks' gestation.
- Standardized ophthalmological and pediatric examinations at 2 years of age.
- Logistic regression analysis to determine risk factors.
Main Results:
- Strabismus risk increased with cicatricial retinopathy of prematurity, refractive error, family history of strabismus, and poor neurodevelopmental outcome (impaired locomotor skills, hand-eye coordination).
- Gestational age and regressed acute retinopathy of prematurity were not independent risk factors.
- 558 premature children were evaluated, representing 98.6% of the study cohort.
Conclusions:
- Identified independent risk factors for strabismus in premature infants.
- Distinguished between direct and indirect contributing factors to strabismus.
- Findings support improved clinical management and targeted research into strabismus causes.
Aim:
To investigate risk factors associated with strabismus in children born prematurely.
Methods:
Prospective study of all children born before 32 weeks' gestation between 1 January 1990 and 31 December 1991 in a geographically defined population of approximately 3 million in the Northern Region of the United Kingdom. All children were examined aged 2 years by the same ophthalmologist and paediatrician.
Results:
558 children (98.6% of study group) were examined. Logistic regression showed an increased risk of strabismus in children with cicatricial retinopathy of prematurity (p=0.02), refractive error (p=0.003), family history of strabismus (p<0.0001), and poor neurodevelopmental outcome (p<0.0001), in particular impaired locomotor skills (p=0.008) and hand-eye coordination (p=0. 001). Gestational age and regressed acute ROP were not independent risk factors for strabismus (p=0.92 and 0.85 respectively).
Conclusions:
This study has identified factors which are independently related to strabismus (although not necessarily causative) and others which are related only indirectly. This may contribute both to the management of children born prematurely and to future studies of the aetiology of strabismus.
Related Concept Videos
Neurulation
Teratogenicity
Accessory Structures of the Eye
Photoreceptors and Visual Pathways
Esophageal Strictures-I: Introduction
Etiology
The primary cause of esophageal strictures is long-standing gastroesophageal reflux disease (GERD), accounting for about 70 to 80% of adult cases. Chronic acid reflux can lead to injury and scarring of the esophageal lining, culminating in...
Varicose Veins I: Introduction

