Year 1 - general mcq's Flashcards
the main elevator when the eye is in abduction is the
superior rectus
the muscle which has actions of depression, abduction and intorsion is the
superior oblique
the 6th cranial nerve supplies the
lateral rectus
the main elevator when the eye is in adduction is the
inferior oblique
a patient looks up and to the right this position is ……….
dextroelevation
the left eye is occluded the right medial rectus moves the eye into
adduction
the right inferior obliques main action is in
laoelevation
the left superior obliques main action is
dextrodepression
when a patients head is stationary and they are asked to move there eyes into the secondary position of gaze this is testing
- smooth pursuit
if 75% of movement is present when the eye moves into elevation , the limitation of movement would be classed as
-1 the eye has moved three quarters of the position and is short by one quarter hence -1
assuming the fundus and media are normal the first steps to consider in the management of any young children with manifest strabismus is
correction of refractive error and occlusion therapy for amblyopia
a 8pd manifest deviaiton is present the angle of deviation returns to the original size when wearing a prism which initally corrrected the deviaition (prism adaptation test) this indicates
abnormal binocular single vision
in patients with abnormal binocular single vision management for the strabismus is usually to do
nothing
a patient with convergence excess esotropia , options to consider are
bifocals, surgery- the esotropia occurs when the patient accomodates for near
a patient with fully accomodative esotropia will
have their deviaiton corrected by wearing a hypermetropic perscription plus perscription)- patient has no manifest deviaiton with glasses on but when they take their glasses off esotropia occurs this is because they have to accomodate without glasses to overcome the hypermetropic error.
