1 CVD Cerebral Visual Disturbance Olga Miller: Lecture Jan 2011 Olga Miller: Lecture Jan 2011

2 What is CVD? Disturbance of vision - damage to the posterior pathways and/or brainlobes dealing with vision; Estimates vary but around 60% of the brain cortex is involved in visual perception; Reflexes in the pupil (eye) are normal and nystagmus is rare.

3 Numbers Approximately one in one thousand children is visually impaired (around 50 children per average health district of 250,000) - a significant percentage will have cerebral visual impairment or CVD (University of Birmingham medical school lecture)

4 Other ocular problems? Often in association with other visual problems; Degree of neurological damage and visual impairment depends on time of onset as well as the location and the intensity of the insult (Bonamie 2000)

5 Characteristics of the development of children with CVD Impaired movement in all four limbs Disturbed sensory integration Personality and social behaviour - regulating tension/relaxation, dealing with frustration/tolerance, interactions, dealing with structure, attention and concentration

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