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Development of normal ocular alignment
N Sondhi1, S M Archer, E M Helveston
1Department of Ophthalmology, Indiana University School of Medicine, Indianapolis.
Insights
Transient ocular deviations like exodeviations are common in infants up to 6 months. Persistent strabismus after specific ages warrants ophthalmologic evaluation for potential abnormalities.
Area of Science:
- Ophthalmology
- Pediatric Ophthalmology
- Developmental Neuroscience
Background:
- Infant ocular alignment is dynamic and undergoes significant changes during early development.
- Understanding normal motility patterns is crucial for identifying potential visual impairments.
Purpose of the Study:
- To determine the prevalence of various ocular motility findings in a large cohort of normal infants.
- To establish normative data for ocular alignment from birth to 10 months of age.
Main Methods:
- Longitudinal observational study involving a large population of normal infants.
- Systematic examination of ocular alignment and motility at regular intervals from birth to 10 months.
Main Results:
- Exodeviations were frequently observed in infants up to 6 months of age.
- Esodeviations were occasionally noted in infants younger than 2 months, but not in those who developed congenital esotropia.
- Transient ocular deviations are common in early infancy.
Conclusions:
- The findings provide normative data on infant ocular motility, distinguishing transient deviations from potential pathological conditions.
- Strabismus persisting beyond the established age norms requires prompt ophthalmologic evaluation.
- Further research is needed to differentiate precursors of pathological strabismus from normal developmental variations.
Abstract:
Ocular alignment was examined in a large population of normal infants to determine the prevalence of various motility findings at ages ranging from birth to 10 months. Exodeviations were frequently seen up to the age of 6 months. Esodeviations were occasionally seen in infants who did not go on to develop congenital esotropia, but not after 2 months of age. It is unclear whether precursors of pathologic strabismus, such as congenital esotropia, can be distinguished from these transient ocular deviations seen in normal infants. However, any strabismus persisting after the ages listed above should be considered abnormal and receive ophthalmologic evaluation.