ial evoked potentials (VEP) evaluating treatment for post-trauma vision syndrome (PTVS) in patients with traumatic brain injuries (TBI)
P A D U L A
I N S T I T U T E O F V I S I O N
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
Tracking and convergence ability for the experimental and control groups
Convergence greater than 5 inches
Convergence less than 5 inches
Table 3 represents tracking and
convergence abilities for the subjects in the
experimental and control group. Tracking was analyzed as
either smooth, jerky or fixation loss. Convergence
ability was measured as no convergence, inability to
converge on a target within a 12 cm working distance and
also convergence of less than a 12 cm working distance.
The experimental group showed more difficulty with
tracking and convergence.
Phoria measurements represent the balance between visual
sensory and motor relationships which establish spatial
perception. Esophoria describes the state of oculomotor
balance causing the eyes to be pulled inwards (when
fusion is lost) causing spatial perception of objects to
be perceived closer. Exophoria is the state of
oculomotor balance causing the eyes to be pulled
outwards (when fusion is lost). This causes a spatial
perception of objects to be perceived farther away.
Orthophoria represents no latent deviation. Strabismus
is the state of an actual ocular deviation.