| Literature DB >> 19679148 |
Jeremy B Wilmer1, Benjamin T Backus.
Abstract
The causes of manifest (strabismus) and latent (phoria) misalignment of the visual axes are incompletely understood. We calculated genetic and environmental contributions to strabismus based upon a critical review and quantitative meta-analysis of previous strabismus twin studies (n=3418 twin pairs) and calculated contributions to phoria based upon a new twin study (n=307 twin pairs). Our results suggest that genetic liability is necessary to develop strabismus, whereas environmental factors are sufficient to cause most phorias. The different etiologies implied by this work suggest that strabismus and phoria should be carefully distinguished in epidemiological work.Entities:
Mesh:
Year: 2009 PMID: 19679148 PMCID: PMC2757458 DOI: 10.1016/j.visres.2009.08.006
Source DB: PubMed Journal: Vision Res ISSN: 0042-6989 Impact factor: 1.886