Development of Vision in Infants and Young Children

Friendly, David S.

doi:10.1016/s0031-3955(16)38580-7

Cited by 19 publications

(7 citation statements)

References 21 publications

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“…They found that the P1 latency was significantly correlated with infants' age and with structural changes in optic radiation, but not with the global maturation of white matter. Similarly, Friendly 43 suggested that the myelination of the LGN pathway was completed by 4 months, which is in accord with our results that adult P1 latency is reached by approximately 15 weeks of age. Others have shown continuation of myelin maturation for the first two years of life.…”

Section: Latency Developmentsupporting

confidence: 92%

Latency Measures of Pattern-Reversal VEP in Adults and Infants: Different Information from Transient P1 Response and Steady-State Phase

Liu

Birtles

Wattam-Bell

et al. 2012

Invest. Ophthalmol. Vis. Sci.

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Section: Latency Developmentsupporting

confidence: 92%

Latency Measures of Pattern-Reversal VEP in Adults and Infants: Different Information from Transient P1 Response and Steady-State Phase

Liu

Birtles

Wattam-Bell

et al. 2012

Invest. Ophthalmol. Vis. Sci.

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“…Our results suggest, furthermore, that the variability of the 0% signal is unlikely to be due to stochastic noise. This is even despite the fact that the method of sweep averaging (which assumes that there are random deflections in the background signal that comprise of noise) works to realize the morphology of low amplitude transient evoked potentials (Friendly, 1993).…”

Section: Resultsmentioning

confidence: 99%

“…However, in this study, the aim was not to determine the underlying structure of the visual system as manifest by the visual evoked potential but, instead, was to determine whether the correlation dimension may be a useful objective parameter of the transient visual evoked potential. Moreover, as the amplitude of the transient chromatic visual evoked potential is very small compared to the background fluctuations that may be related to other sources, such as the EEG (e.g., Friendly, 1993), it is necessary to average sweeps in order to access the transient VEP.…”

Section: Rationale For Methods Of Correlation Dimension Estimationmentioning

confidence: 99%

The correlation dimension: A useful objective measure of the transient visual evoked potential?

et al. 2008

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Visual evoked potentials (VEPs) may be analyzed by examination of the morphology of their components, such as negative (N) and positive (P) peaks. However, methods that rely on component identification may be unreliable when dealing with responses of complex and variable morphology; therefore, objective methods are also useful. One potentially useful measure of the VEP is the correlation dimension. Its relevance to the visual system was investigated by examining its behavior when applied to the transient VEP in response to a range of chromatic contrasts (42%, two times psychophysical threshold, at psychophysical threshold) and to the visually unevoked response (zero contrast). Tests of nonlinearity (e.g., surrogate testing) were conducted. The correlation dimension was found to be negatively correlated with a stimulus property (chromatic contrast) and a known linear measure (the Fourier-derived VEP amplitude). It was also found to be related to visibility and perception of the stimulus such that the dimension reached a maximum for most of the participants at psychophysical threshold. The latter suggests that the correlation dimension may be useful as a diagnostic parameter to estimate psychophysical threshold and may find application in the objective screening and monitoring of congenital and acquired color vision deficiencies, with or without associated disease processes.

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“…Development is particularly rapid in the first year of life, although some changes continue into late childhood 19 10 As a child with normal vision only achieves adult levels of visual function at about 5 years,9 it is difficult to predict final visual outcome in younger children with visual defects.…”

Section: Normal Visual Developmentmentioning

confidence: 99%