Neurological vision
impairment is loss of vision resulting from an acquired brain injury or
impairment in the coordination of the
eyes, and difficulties with visual perception (also
known as ABI VI). Damage to the areas of the brain that are responsible for
sight is involved. The many causes of ABI
VI include stroke, brain tumour, head injury and infections such as meningitis.
ABI VI used to be called cortical visual impairment and cortical blindness.
Our eyes deliver information on the world around
us to various parts of the brain via nerves that detect light. The occipital
cortex, situated at the rear of the brain, processes the information and allows
us to see distance, shape, movement and colour. The type and severity of vision loss depend on which area of the brain
was affected and to what degree. In some cases, the impairment may improve with
time – for example, children with ABI VI tend to experience improvement as they
grow older.
No comments:
Post a Comment