What are the main causes of A-V syndrome?

summary

A-V syndrome is a subtype of horizontal strabismus accompanied by vertical non concomitant strabismus, that is, when looking up and down, the horizontal deviation changes significantly, and is named by the letters "a" and "V". What are the main causes of A-V syndrome? Next, I'd like to share my views with you.

What are the main causes of A-V syndrome?

Urist thinks that the formation of A-V sign is related to the strength difference between the medial rectus and the lateral rectus when they are looking up and down. In physiological state, when both eyes are looking up, the separation effect increases slightly.

Jampolsky thinks that the strength of the upper and lower oblique muscles is an important reason for the formation of A-V sign. Because the secondary role of the oblique muscle makes the eyeball turn outward, when the strength of the lower oblique muscle is too strong, V phenomenon can be caused; When the strength of inferior oblique muscle is not enough, a phenomenon will occur; The strength of superior oblique muscle is too strong to cause a phenomenon; In a word, the increase of horizontal inclination when looking upward is the cause of inferior oblique muscle, while the increase of horizontal inclination when looking downward is the cause of superior oblique muscle. Von Noorden thinks that the abnormal function of oblique muscle is the common cause of A-V syndrome. A-V syndrome with abnormal function of oblique muscle often causes rotational strabismus, Rotatory strabismus is caused by A-V syndrome with abnormal function of the oblique muscle. After correction by tilting the end of the horizontal muscle, the rotatory strabismus cannot be corrected. This rotatory strabismus is confirmed by fundus photography,

Brown thinks that the strength of the upper and lower rectus muscles is one of the reasons for the formation of A-V sign. Because these two muscles have the secondary role of making the eyeball turn inward, when the strength of the upper rectus muscle is too strong, a phenomenon can be caused; When the strength of superior rectus is weak, V phenomenon occurs; When the strength of inferior rectus is strong, it can cause V phenomenon; In a word, the difference of horizontal inclination between the two groups is caused by the superior rectus muscle, while the difference of horizontal inclination between the two groups is caused by the inferior rectus muscle,

matters needing attention

The harm of strabismus not only affects the beauty, in order to reduce and avoid the above serious complications, we must take it seriously and treat it as soon as possible. Because strabismus affects the beauty, children with strabismus are often nicknamed by people, which casts a shadow on children's psychology and causes their loneliness and abnormal psychology. In general, the vision of most children with strabismus is reduced in varying degrees, especially in monocular strabismus.