Strabismus Flashcards
One eye deviated inward while other one fixates
Esotropia
Eye positioned outward manifested without breaking fusion can be constant or intermittent and unilateral or alternating
Exotropia
In strab the cond in which one eye deviates or sims up while other eye fixates
Hyperopia
In strab the cond in which one eye deviates or sims up while other eye fixates
Hyperopia
In strab the cond in which one eye deviates or sims downward while other eye fixates
Hypotropia
An ability of the 2 eyes to aim at the same spot at same time this can result in the eye turning in out up or down a child with an eye turn may experience period of double vision and if untreated this condition can lead to amblyopia( leading cause of amblyopia deviation of alignment of one eye in relation to the other
Strabismus
The angle of deviation phobias or tropia is the same in all positions of gaze. An angle of turn that is constant in all directions of gaze. Eyes work equally in all directions of gaze.
Comitant ( concomitant)
The angle of deviation ( photos or tropia varies according to the position of gaze. Related to paralysis or paresis of one or more ocular muscles this can take many forms and be at a different degree ranges from insequential limitation of gaze on extreme version to significant limitation in near primary gaze ( rarely a true muscle problem almost always a innervations problem) ex a, v,x syndrome
Incomitant or non-comitent
Eye turns always or almost always ( our doc if it’s happening majority of time distance or near it will be constant distance only int near only int
Constant
Eye turns always or almost always ( our doc if it’s happening majority of time distance or near it will be constant distance only int near only int
Constant
Not constant in strab the deviation is manifested irregular ly it is not always present there are times and cond when the eyes are aligned motor fusion eye position comitancy
Intermittent
Superimposition refers to common localization of dissimilar but compatible images presented separately to each eye fish and bowl fusion. Of dissimilar but compatible images presented separately to each eye
First degree fusion
Flat fusion single simultaneous perception of identical targets normally a suppression control
2nd degree fusion
Stereopsis perception of depth vecto
3rd degree fusion
Refers to the cond where all or part of the visual field is not perceived suppression occurs upon simultaneous stim of both eyes as the main purpose of supression is to secure single vision where it could not be otherwise attainable
Supression