Ulrike Klein-Scharff , Guntram Kommerell, Wolf A Lagrèze*
Universitäts-Augenklinik, Freiburg, Germany
Vertical accommodative vergence is an unusual synkinesis in which vertical vergence is modulated together with accommodation. It results from a supranuclear miswiring of the network normally conveying accommodative convergence. So far, it is unknown whether this condition is congenital or acquired. We identified an otherwise healthy girl who gradually developed vertical accommodative vergence between five to 13 years of age. Change of accommodation by 3 diopters induced a vertical vergence of 10 degrees. This observation proves that the miswiring responsible for vertical accommodative vergence must not necessarily be congenital, but can be acquired. The cause and the mechanism leading to vertical accommodative vergence are yet unknown.
Received Date: 17/1/2008 Revision Received Date: 20/2/2008 Acceptance Date: 21/2/2008 Electronic publication date: 8/3/2008 Collection year: 2008
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