Acquired Vertical Accommodative Vergence
Ulrike Klein-Scharff , Guntram Kommerell, Wolf A Lagrèze*
Identifiers and Pagination:Year: 2008
First Page: 34
Last Page: 36
Publisher Id: TOOPHTJ-2-34
Article History: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
open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.5/) which permits unrestrictive use, distribution, and reproduction in any medium, provided the original work is properly cited.
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.