Lens coloboma associated with a ciliary body cyst.
ABSTRACT Isolated congenital lens coloboma is a sectoral indentation of the crystalline lens due to zonular weakness or absence. The purpose of this report is to describe the association of lens coloboma with an adjacent cyst in the ciliary body and to suggest that ciliary body cysts may be an under-recognized cause of congenital lens coloboma.
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ABSTRACT: A lens coloboma is characterized by the lens tissue's notching at the equator. It is usually inferior-nasal else it is called an atypical coloboma. We report a young male who presented with a superior lens coloboma, an elevation deficit and moderate ptosis, left eye. As superior rectus and levator muscles are derived from the neural crest cell we propose, genetically, there may be an association between the lens coloboma and the superior rectus/levator muscle underaction via an anomalous homeobox gene function.Journal of Optometry 01/2009; 2(2):67-69.
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ABSTRACT: A lens coloboma is not a true coloboma; it is just a zonular absence that causes a defect in the lens equator and hence a more spherical lens. It can be isolated or in association with iris, choroid or retinal colobomas. Typically the defect is present at the site of the embryonic fissure, but it can be present elsewhere. This congenital defect can cause amblyopia, especially when it is associated with cataract. We describe a case of a 39-year-old male with an atypical coloboma that was managed successfully with phacoemulsification, capsular tension ring and intraocular lens implantation. Scheimpflug image analysis and full ophthalmological assessment were performed. Scheimpflug images demonstrated a notching of the lens equator and an absence of zonulae. During the surgical procedure an ophthalmic viscosurgical device was used to tamponade the vitreous, and after continuous curvilinear capsulorhexis the capsular tension ring was inserted to allow the surgeon to perform a safe phacoemulsification.Case reports in ophthalmology. 09/2012; 3(3):317-20.
Article: Beidseitiger Zonulafaserdefekt[Show abstract] [Hide abstract]
ABSTRACT: Kolobome des vorderen Augenabschnittes können isoliert oder in Kombination mit Veränderungen des hinteren Augenabschnitts vorkommen. Kolobome der Zonulafasern führen meist zu einer deutlichen Myopisierung und zum Astigmatismus, da sich die Linsenform verändert. Dadurch besteht die Gefahr der Amblyopie. Auch eine Kataraktentwicklung ist möglich. Wir beschreiben 2 unterschiedlich ausgeprägte Fälle eines Zonulakoloboms und diskutieren die häufigsten Differenzialdiagnosen. Anterior segment colobomas can be found isolated or in combination with changes in the posterior segment. A coloboma of the ciliary zonule leads to alteration of the lens profile with myopia and astigmatism. Amblyopia and cataract development may also occur. We present two cases with a coloboma of the zonule with different degrees of expression and the most important differential diagnoses are discussed. SchlüsselwörterZonulafaserdefekt–Zonulakolobom–Linsenkolobom–Astigmatismus–Kolobom KeywordsCiliary zonule defect–Coloboma of the zonule–Coloboma of the lens–Astigmatism–ColobomaDer Ophthalmologe 01/2011; 108(7):672-675. · 0.72 Impact Factor