Horizontal tendon vertical transposition

Vertical non-common strabismus cases (AV syndrome), if there is no obvious oblique dysfunction, vertical horizontal muscle displacement can reduce or eliminate vertical non-common strabismus. Treatment of diseases: AV syndrome common strabismus Indication AV syndrome, vertical non-common strabismus. Contraindications Superior oblique muscle ablation Surgical procedure Internal oblique AV syndrome caused by internal rectus tendon. The double rectus muscle should be migrated and the tendon should be weighed in the direction of the collection. For example, the inner oblique A is shifted upward. The inner oblique V is shifted downward, and can be shifted by 5 to 10 mm depending on the degree of the AV phenomenon. Due to the exotropia AV syndrome caused by lateral rectus hyperthyroidism, the bilateral external rectus muscles can also migrate and shift the tendon outwardly. That is, the outer V is obliquely shifted upward. The outer oblique A is shifted downward. If you simultaneously weaken a horizontal muscle on one eye and strengthen its direct antagonist muscle, the A sign will shift the medial rectus muscle upwards, shifting the lateral rectus muscle downward, and the V sign will move the lateral rectus muscle. Move the medial rectus muscle down. Since the relationship between the plane of the horizontal muscle fibers and the center of rotation of the eyeball changes after surgery, when the eyeball is looking up or down, its up or down force is strengthened and the internal or external rotation force is weakened, thereby correcting or weakening the eyeball upwards or The difference between the angles of the bet. The external oblique V caused by hyperosposis of the inferior oblique muscle can attenuate the double inferior oblique muscle and relieve the V phenomenon caused by the difference in the oblique angle of view when looking upwards and downwardly, but at the same time, the horizontal muscle surgery is needed to correct the external oblique.

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