Accommodative Vergence Dysfunction Flashcards
Occurs when the amplitude of accommodation (AA) is lowerthan the expected AA for the patient’s age
Accommodative Insufficiency
is a condition in which the AA is normal,
Ill Sustained Accommodation
Also called as accommodative inertia
Accommodative Infacility
rare condition in which the accommodative system fails to
respond to any stimulus.
Paralysis of Accommodation
the result of overstimulation of the parasympathetic nervous system.
Spasm of Accommodation
(overaccommodation, overconvergence and miotic pupils) is also known as
(SNR) Spasm of Near Reflex
occurs when the accommodative system is slow in making a change, or when there is a considerable lag between the
stimulus
Accommodative Infacility
Receded near point of convergence
Convergence Insufficiency
What composes the Spasm of Near Reflex
Overaccommodation,overconvergence and miotic pupils
Meaning of PFC
Positive Fusional Convergence
Meaning of NRA
Negative Relative Accommodation
Meaning of NPC
Near Point of Convergence
Can be described as exophoria or exotropia at far greater than the near deviation by at least 10 prism diopters (PD).
Diverging Excess
Can be described as exophoria or exotropia at near greater than the far deviation by at least 10 prism diopters (PD).
Convergence Insufficiency
has a deviation of similar magnitude at both distance and near Or if the difference between the far and near exophoria is below 10PD.
Basic Exophoria
The etiology of the higher esodeviation at near most
commonly is indicated by a high accommodative
convergence/accommodation (AC/A) ratio.
Convergence Excess
tonic esophoria is high when measured at distance but less at near.
Divergence Insufficiency
has high tonic esophoria at distance, a similar degree of esophoria at near, and a normal AC/A ratio.
Basic Esophoria
often have normal phorias and AC/A ratios but
reduced fusional vergence amplitudes. Their zone of clear, single binocular vision is small.
Fusional Vergence Dysfunction
May be either comitant and idiopathic or noncomitant, due to muscle paresis or other mechanical cause.
Vertical Heterophorias
Has different phorias in far and near.
Mixed Phoria
Distance: 9 exo
Near: 20 exo
Convergence Insufficiency
Convergence Excess
D 12 exo
N 1 exo
Divergence Excess
Divergence Insufficiency
D 2 exo
N 2 exo
Basic Exophoria
Basic Esophoria
D 5 exo
N 2 eso
Mixed Phoria
