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The development of the temporal and nasal visual fields during infancy
Insights
Infant visual field development expands from the center outward with age. Nasal visual field development lags behind temporal visual field development in infants.
Area of Science:
- Ophthalmology
- Developmental Neuroscience
- Pediatric Vision
Background:
- The development of the visual system is crucial for infant cognitive and motor skills.
- Understanding the timeline of visual field expansion in infants provides insights into neurodevelopmental trajectories.
Purpose of the Study:
- To quantitatively measure the developmental progression of the monocular visual field in infants.
- To compare visual field development in the temporal and nasal visual fields during early infancy.
Main Methods:
- Static perimetry was employed to assess visual field extent in infants (0-6 months) and adults.
- Flashing lights of 3 and 6 degrees were presented at varying eccentricities (15-120 degrees) in temporal and nasal visual fields.
- Visual detection was inferred from eye movements towards stimuli compared to control trials.
Main Results:
- The visual field demonstrated age-dependent expansion from central to peripheral vision for both 3 and 6-degree stimuli.
- Development of the nasal visual field showed a delay compared to the temporal visual field in infants.
- Adults exhibited a fully developed visual field, serving as a benchmark for infant development.
Conclusions:
- Infant visual field development is a gradual process characterized by outward expansion.
- Asymmetries in visual field development, with nasal lagging behind temporal, are evident in early infancy.
- These findings contribute to understanding typical visual development and potential indicators for visual pathway maturation.
Abstract:
We used static perimetry to measure the development of the monocular visual field during infancy. Infants from birth to 6 months of age, and adults, were shown a 3 or 6 degrees flashing light at various locations between 15 and 120 degrees in the temporal and nasal visual fields. We assumed that subjects could see a light if they moved their eyes toward it more often than they looked in the same direction on blank control trials. For both the 3 and 6 degrees lights, the visual field expanded with age from the center out, and development in the nasal visual field lagged behind development in the temporal visual field. Possible reasons for these findings are discussed.