Accommodative and Vergence Dysfuntion Flashcards
Occurs when the amplitude of accommodation (AA) is lower than the expected AA for the patient’s age and is not due to sclerosis of the crystalline lens
Accommodative Insufficiency
A condition in which the AA is normal, but fatigue occurs with repeated accommodative stimulation
Ill-sustained Accommodation
also known as accommodative inertia, occurs when the accommodative system is slow in making a change, or when there is a considerable lag between the stimulus to accommodation and the accommodative response; patient often reports blurred distance vision immediately following sustained near work
Accommodative Infacility
A rare conditikn in which the accommodative system fails to respond to any stimulus; it can be caused by the use of cycloplegic drugs or by trauma ocular, or systemic disease, toxicity, or poisoning; can be unilateral or bilateral, may be associated with a fixed, dilated pupil
Paralysis of Accommodation
The result of overstimulation of the parasympathetic nervous system and may be associated with fatigue
Spasm of Accommodation
Exophoria or exotropia at near greater than the far deviation by at least 10 PD
Convergence Insufficiency
Exophoria or exotropia at far then the newr deviation by at least 10 PD
Divergence Excess
Has deviation of similar magnitude at both distance and near, or difference between far and near exophoria is below 10PD
Basic Exophoria
Esophoria or esotropia at near greater than the far deviation by at least 10PD
Convergence Excess
Esophoria or esotropia at far greater than the nesr deviation by at least 10PD
Divergence Insufficiency
Difference between distance and near esophoria is below 10PD
Basic Esophoria
Often have normal phorias and AC/A ratios but reduced fusional vergence amplitudes
Fusional Vergence Dysfunction
Demonstrate a hyperphoria in primary gaze that is initially greatest during depression and adduction of the affected eye
Vertical Heterophoria
Has different phorias in far and near
Mixed Phoria
