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Following a Traumatic Brain Injury, ambient processing dysfunction may be the cause of what the authors have termed post-trauma vision syndrome (PTVS).

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	Visual evoked potentials (VEP) evaluating treatment for post-trauma vision syndrome (PTVS) in patients with traumatic brain injuries (TBI) Brain Injury, 1994, VOL. 8, NO. 2. 125-133
	W. V. PADULA, S. ARGYRIS and J. RAY

	Table 9.
	Characteristics and symptoms of post-trauma vision syndrome
	Common characteristics	Common symptoms
	Exotropia	Diplopia
	Exophoria	Blurred near vision
	Convergence insufficiency	Perceived movement of print or stationary objects
	Accommodative insufficiency	Asthenopia
	Oculomotor dysfunction	Headaches
	Increased myopia	Photophobia

Disturbance in the ambient system appears to cause the dysfunction of binocularity for the persons in this study and, for many affected persons, may actually lead to strabismus, convergence insufficiency, accommodative insufficiency and oculomotor dysfunction. Thus, it is suggested that, following a TBI, ambient processing dysfunction may be the cause of what the authors have termed post-trauma vision syndrome (PTVS). Understood in this way, the specific binocular dysfunctions are actually characteristic of PTVS (see Table 9).

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