Dissociated vertical deviation

With the amount dissociated strabismus (also: dissociated vertical divergence or DVD ) is defined as a usually bilateral alternating, but not necessarily symmetrical, vertical strabismus deviation of the eyes upward. Not infrequently it is connected to a Verrollungsschielen outward ( Exzyklotropie ). This squint shape represents a special kind of eye muscle imbalance and can not simply be explained by a positive or negative function of a straight or slanted vertical eye muscle. During the Abweichphase the occurrence of double vision is very rare, but sometimes happens.

Often this height variation of the concentration, daydreaming or fatigue occurs when reading small fonts, slacking off. However, they can also be caused by covering of an eye, in which then the covered eye drifts upward. It does not seem the interruption of an unstable fusion to be decisive, but obviously the light deprivation. It then stops in front of the dominant eye a color filter, then the deviated eye moves upward under the cover back down slowly. The same happens when the eye is turned up again, this downward movement earlier mistaken for a merger movement and the dissociating height strabismus was incorrectly referred to as alternating hyperphoria.

A dissociated strabismus height is approximately 90% of cases an accompanying symptom of the so-called congenital strabismus syndrome. Since in this case, other vertical disturbances, for example, a sursoadductorius strabismus may be present, it is imperative to determine as precisely as possible delimitation of the dissociated portions of a vertical squint angle on associates, obliquusbezogenen pulses. In particular, for the determination of correct dosage at a planned strabismus surgery, this is of importance.

Therapy

In general, a dissociated strabismus height is not treated surgically or only in very rare cases. It should also be borne in mind that it is over the years is not abandoning its own, really problematic and difficult cosmetically disfiguring forms, however, only occur in about 1-3 % of cases. So be indexed accordingly, has proven itself as an operational method as being a so-called posterior fixation of musculus rectus superior than the best variant.