Anterior transposition compared to graded recession of the inferior oblique muscle for V-pattern strabismus

Abstract

AT is at least as effective as GR in the treatment of V-pattern strabismus caused by overaction of the inferior oblique muscle.

Dose–response relationship in inferior oblique muscle recession

“…It seems therefore reasonable to combine the recession with an anteroposition, if the preoperative V-incomitance is small. This, howewer, is in contrast to the findings by Minguini, who reported no difference between pure anteroposition and pure recession in terms of AVincomitance [34].…”

“…The larger variation of effects found in our cohort does not allow judgement on the linearity of the dose-response realtionship. Due to the design of the analysis, we cannot answer the question whether the response correlates with the magnitude of the pre-operative deviation, as argued by some authors [10,15,17,34].…”

“…Some authors state that the response depends on the extent of the preoperative deviation [10,15,17,34].…”

Inferior Oblique Muscle Weakening: Is It Possible to Quantify Its Effects on Horizontal Deviations?

“…There is a knowledge that the weakening of the inferior oblique muscles causes an esodeviation about 5–10 PD, and the weakening of the superior oblique muscles causes an esodeviation about 10–15 PD [8]. There are a number of previous studies that were designed to provide comparative data on inferior oblique muscle weakening surgeries' effects on vertical deviations [4, 7, 9–11]. According to this data, there is a possibility that inferior oblique weakening may affect by itself horizontal alignment in primary position, may influence plans and numbers of horizontal muscle surgeries, and furthermore it may be enough in a particular amount of deviations to provide horizontal alignment without need for additional horizontal surgeries.…”

Historical review of inferior oblique muscle surgery

“…[3940414243] Many researchers believe when vertical deviation at primary position exceeds 15 p.d., an IO muscle myectomy is not enough. [444546] Plager proposed to determine the surgical approach to congenital superior oblique palsy with intraoperative superior oblique tendon traction test,[47] and recommends superior oblique tendon tuck procedure when the tendon is lax.…”