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4. The development of symmetrical OKN in infants: quantification based on OKN acuity for nasalward versus temporalward motion

Author

Joanna Y.Y Chung, Terri L. Lewis, Daphne Maurer, Charmaine S. Van Schaik, and Rebecca Holmes-Shannon

Subjects
medicine.medical_specialty, Optokinetic nystagmus, Visual acuity, Acuity, Development, Audiology, Motion (physics), Developmental psychology, Child Development, Vision, Monocular, medicine, Psychophysics, Humans, Visual Pathways, Nystagmus, Optokinetic, Visual Cortex, Developmental stage, Infant, Optokinetic reflex, Infant vision, Sensory Systems, Monocular optokinetic nystagmus asymmetries, Visual field, Ophthalmology, Child, Preschool, Spatial frequency, Champ visuel, medicine.symptom, Psychology
Abstract

We quantified OKN asymmetry in 140 normal infants, 3–24 months old, by varying spatial frequency to determine OKN acuity for temporal-to-nasal (T-N) versus nasal-to-temporal (N-T) motion. At all ages, OKN acuity was asymmetrical (better for T-N than for N-T motion) but the size of the asymmetry decreased from 3.2 to 0.7 octaves between 3–24 months, primarily because of improvements in OKN acuity for N-T motion. The results suggest that immaturities in the cortical pathways involved in OKN persist until at least 2 years of age.

Published
2000
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