Leukocoria

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Leukocoria (also leukokoria^[1]) is an abnormal white reflection from the retina. Despite its color, the reflection is related to the familiar red-eye effect, not to eyeshine. Leukocoria can be detected by routine medical ophthalmoscopy. Usually, when a light is shone through the iris,^{[citation needed]} the retina appears red to the observer. In leukocoria, the retina abnormally appears white. This may indicate congenital cataracts, retrolental fibroplasia, corneal scarring, retinoblastoma, ocular toxocariasis, persistence of the tunica vasculosa lentis (PFV/PHPV), Coats' disease, Norrie disease, melanoma of the ciliary body^[2], etc. Because of the potential life threatening nature of retinoblastoma, a cancer, that condition is usually considered in the evaluation of leukocoria.

[edit] References

1. ^ thefreedictionary.com
2. ^ Demirci H et al. Leucocoria as the presenting sign of a ciliary body melanoma in a child. Br J Ophthalmol 2001;85:115-6. PMID 11201946.

v • d • e Sensory system – Visual system – Eye Fibrous tunic (outer) Conjunctiva • Sclera • Schlemm's canal • Trabecular meshwork • Limbus Cornea (Epithelium, Bowman's, Stroma, Descemet's, Endothelium) Uvea (middle) Choroid (Ciliary processes, Choriocapillaris, Bruch's membrane) • Iris (Stroma) • Pupil • Ciliary body Retina (inner) Macula • Fovea • Optic disc • Tapetum lucidum Anterior segment Anterior chamber • Aqueous humour • Posterior chamber • Lens Posterior segment Vitreous humour • Zonule of Zinn Intraocular muscles parasympathetic (Ciliary muscle, Iris sphincter muscle) • sympathetic (Iris dilator muscle) Appearance phenomena of the eye Eyeshine • Leukocoria • Red-eye effect • Red reflex Appearance phenomena by the eye Color appearance (Abney effect • Bezold-Brücke shift • Chromatic adaptation • Purkinje effect)

[edit] External links

• PHPV Persistent Hyperplastic Primary Vitreous
• Retinoblastoma MedPix Images