|Classification and external resources|
A child with leukocoria due to retinoblastoma in the left eye
Leukocoria (also leukokoria or white pupillary reflex) is an abnormal white reflection from the retina of the eye. Leukocoria resembles eyeshine, but leukocoria can occur in humans and other animals that lack eyeshine because their retina lacks a tapetum lucidum.
Leukocoria is a medical sign for a number of conditions, including Coats disease, congenital cataract, corneal scarring, melanoma of the ciliary body, Norrie disease, ocular toxocariasis, persistence of the tunica vasculosa lentis (PFV/PHPV), retinoblastoma, and retrolental fibroplasia.
Because of the potential life threatening nature of retinoblastoma, a cancer, that condition is usually considered in the evaluation of leukocoria. In some rare cases (1%) the leukocoria is caused by Coats' disease (leaking retinal vessels).
On photographs taken using a flash, instead of the familiar red-eye effect leukocoria can cause a bright white reflection in an affected eye. Leukocoria may appear also in low indirect light, similar to eyeshine.
Leukocoria can be detected by a routine eye exam (see Ophthalmoscopy). For screening purposes, the red reflex test is used. In this test, when a light is shone briefly through the pupil, an orange red reflection is normal. A white reflection is leukocoria.
- The fictional serial killer known as "The Collector", the main antagonist of the films The Collector (2009) and The Collection (2012), suffers the condition in both eyes.
- Demirci H, Shields CL, Shields JA, Honavar SG, Eagle RC (January 2001). "Leucocoria as the presenting sign of a ciliary body melanoma in a child". The British Journal of Ophthalmology 85 (1): 115–6. PMC 1723667. PMID 11201946.
- "The 'strange white light' that nearly killed baby Grace". Daily Mail. June 1, 2009.
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