Hypo-accommodation responses in hypermetropic infants and children

AimsAccommodation to overcome hypermetropia is implicated in emmetropisation. This study recorded accommodation responses in a wide range of emmetropising infants and older children with clinically significant hypermetropia to assess common characteristics and differences.MethodsA PlusoptiXSO4 photorefractor in a laboratory setting was used to collect binocular accommodation data from participants viewing a detailed picture target moving between 33 cm and 2 m. 38 typically developing infants were studied between 6 and 26 weeks of age and were compared with cross-sectional data from children 5–9 y of age with clinically significant hypermetropia (n=15), corrected fully accommodative strabismus (n=14) and 27 age-matched controls.ResultsHypermetropes of all ages under-accommodated compared to controls at all distances, whether corrected or not (p