Cycloplegic refractions in infants and young children

Area of Science:

• Ophthalmology
• Pediatric Ophthalmology
• Vision Science

Background:

• Astigmatism is a common refractive error affecting visual development.
• Understanding the incidence of infantile astigmatism is crucial for early detection and intervention.
• Existing data on infantile astigmatism prevalence varies, particularly concerning measurement methods.

Purpose of the Study:

• To determine the incidence of astigmatism in normal infants compared to infants with amblyopia and esotropia.
• To analyze the prevalence of astigmatism during the first three postnatal years.
• To compare refractive error distributions (spherical equivalents, anisometropia) in different infant groups.

Main Methods:

• Cycloplegic refractions were performed on groups of normal infants and infants diagnosed with amblyopia or esotropia.
• Incidence rates of astigmatism were calculated for each group.
• Spherical equivalents and anisometropia were assessed and compared across groups.

Main Results:

• Nineteen percent of normal infants exhibited astigmatism under cycloplegia.
• The incidence of astigmatism in normal infants was double that found in adults.
• No significant differences in astigmatism incidence, spherical equivalents, or anisometropia were observed between normal infants and those with esotropia/amblyopia during the first three years.

Conclusions:

• Infantile astigmatism is prevalent, with a higher incidence in infants than adults.
• Cycloplegic refraction is essential for accurate assessment of infantile astigmatism.
• Early childhood visual conditions like esotropia and amblyopia do not appear to be distinguished by the incidence or distribution of astigmatism during the first three postnatal years.