Cerebral Visual Impairment in Children: Visuoperceptive and by Josef Zihl, Gordon N. Dutton

By Josef Zihl, Gordon N. Dutton

Cerebral visible problems have far-reaching outcomes for baby improvement. those have profound opposed results on children’s schooling and good fortune in class and in addition in later existence, yet, regrettably, cerebral visible issues frequently stay undiagnosed and untreated within the pediatric inhabitants. This ebook offers a cutting-edge account of what's identified concerning the improvement and problems of visible belief in teenagers. It covers the improvement and problems of visible notion in kids, their evaluate, early intervention and administration in an interdisciplinary context, either from a systematic in addition to scientific point of view. Case stories illustrate the prompt evaluate and rehabilitation systems; synopses, containers and check-lists supplement the presentation of our strategies for scientific practice.

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Extra info for Cerebral Visual Impairment in Children: Visuoperceptive and Visuocognitive Disorders

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3 Development of Vision and of Its Neurobiological Foundations 27 represents an already prominent visual attribute in early childhood (Catherwood et al. 1996). At the age of 6 months, the capacity for colour discrimination appears similar to adults (Franklin and Davies 2004; Abramov and Gordon 2006). 5 Visual Space Perception Definition. Visual spatial functions comprise the processing of spatial properties of optical stimuli and include position, distance, depth, and direction (horizontal, vertical and straight ahead) as well as of spatial relations of stimuli (objects) in a scene, of both a three- and a two-dimensional nature (Zihl 2011).

An essential prerequisite for detecting peripheral stimuli and being responsive in terms of orienting responses (eye and head movements, grasping) is an adequate level of alertness and attention, and of visual curiosity for the visual world. These prerequisites are not always sufficiently available in the first months (Richards and Hunter 1998). 3 Development of Vision and of Its Neurobiological Foundations 23 90° 180° 20° 40° 60° 80° 0° 20° 40° 60° 80° 270° Fig. 4 Development of visual field (Adapted from Schwartz et al.

2007). Coloured stimuli possibly appear less intense during the first months, because children at this age require a higher colour contrast for accurate discrimination (Morrone et al. 1990; Allen et al. 1993; Teller and Lindsey 1993). However, children may be able to use colour as a feature to discriminate, identify and recognise objects. 3 Development of Vision and of Its Neurobiological Foundations 27 represents an already prominent visual attribute in early childhood (Catherwood et al. 1996).

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