Australian and New Zealand journal of ophthalmology · 1997
Changes in the interpupillary distance with age and its effect on the near fusion free position.
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Chen A H, O'Leary D J
Аннотация
PURPOSE: The effect of the rate of the interpupillary distance (IPD) change with age on the near fusion free position was investigated in the present study.
METHODS: Three hundred and fifty-two children aged from 2 to 16 years of age were tested. Interpupillary distance was estimated with a modified Viktorin's method and the near fusion free position was measured with a modified Maddox Wing.
RESULTS: The results reveal a significant difference in IPD growth rate between females and males and between children aged below and above 5 years. Most children below 5 years of age were orthophoric, but heterophoria became more common above 5 years of age.
CONCLUSION: The present study suggests that the oculomotor control system for convergence can compensate for age changes in IPD.
METHODS: Three hundred and fifty-two children aged from 2 to 16 years of age were tested. Interpupillary distance was estimated with a modified Viktorin's method and the near fusion free position was measured with a modified Maddox Wing.
RESULTS: The results reveal a significant difference in IPD growth rate between females and males and between children aged below and above 5 years. Most children below 5 years of age were orthophoric, but heterophoria became more common above 5 years of age.
CONCLUSION: The present study suggests that the oculomotor control system for convergence can compensate for age changes in IPD.