What is inferior oblique Overaction?

What is inferior oblique Overaction?

In primary inferior oblique muscle overaction, an upshoot of the adducting eye occurs when gaze is directed into the field of action of the inferior oblique muscle, producing a greater upward excursion of the adducted eye than of the abducted eye.

What causes inferior oblique Overaction?

Secondary oblique overaction is caused by a paresis of the antagonist muscle. A superior oblique paresis results in inferior oblique overaction, and inferior oblique paresis results in superior oblique overaction.

What is hypertrophy of the eye?

When someone has hypertropia, one eye turns up while the other looks in the right direction. It’s not common, and there are treatments to correct it. Your eyes are a team, working together to see clearly and focus on images near and far. But sometimes eyes move separately.

What does the inferior oblique do in the eye?

The inferior oblique muscle externally rotates, elevates, and abducts the eye.

How do you fix superior oblique palsy?

The treatment of choice for congenital superior oblique palsy and for an unresolved (after 6 months) acquired palsy is typically eye muscle surgery. Surgery usually minimizes double vision, reduces the unsightly upward drift of an eye, and corrects a compensatory head tilt.

Can Brown syndrome cured?

Brown syndrome due to other conditions is more likely to go away without surgery. Treating the underlying health condition may help reduce symptoms. For example, someone with Brown syndrome due to lupus might find it helpful to be treated with corticosteroids.

How is Hyperphoria treated?

Vision therapy is essential for the treatment of hyperphoria. Vision therapy may involve the use of specialized tools such as prisms, a series of vision therapy exercises, computer or virtual reality games and vectograms. Vision therapy will aim to improve the eye position by strengthening: Eye coordination.

When the right inferior oblique contracts the eyeball turns?

When it contracts, it laterally rotates the eye, in opposition to the superior oblique. Rotation of the eye by the two oblique muscles is necessary because the eye is not perfectly aligned on the sagittal plane.

What is right superior oblique palsy?

Superior oblique palsy, also known as trochlear nerve palsy or fourth nerve palsy, happens when the superior oblique muscle is weak, resulting in a misalignment of the eyes. This misalignment can be vertical, horizontal or torsional. This weakness can vary in degrees from slight to severe.

What can cause superior oblique palsy?

A common cause of acquired superior oblique palsy is head trauma, including relatively minor trauma. A concussion or whiplash injury from a motor vehicle accident may be sufficient enough to cause the problem. Rare causes of superior oblique palsy are stroke, tumor and aneurysm.

Is there a hypertropia in inferior oblique overaction?

In inferior oblique overaction there is an increase of ipsilateral hypertropia in adduction to the contralateral side with a contralateral hypotropia, whereas in DVD, there is a hypertropia in adduction as well as in and abduction without a true contralateral hypotropia, when binocular fusion is interrupted.

How does hypertropia affect the movement of the eyes?

Hypertropia may be either congenital or acquired, and misalignment is due to imbalance in extraocular muscle function. The superior rectus, inferior rectus, superior oblique, and inferior oblique muscles affect the vertical movement of the eyes. These muscles can be paretic, restrictive (fibrosis) or overactive.

Is there a treatment for inferior oblique underaction?

Therapy for inferior oblique underaction includes techniques that involve the antagonist superior oblique muscle or the contralateral yoke muscle, 9,10 and they are not discussed here.

Which is the primary cause of inferior oblique muscle overaction?

Primary type is frequently bilateral and its etiology is unclear, but secondary type is unilateral and is caused by ipsilateral superior oblique (SO) palsy or contralateral superior rectus palsy [ 1 – 4 ].