What clinical finding would be observed in a child suspected of having retinoblastoma?

Leukocoria, or a white reflex in the pupil, is a significant clinical finding in a child suspected of having retinoblastoma. Retinoblastoma is a type of eye cancer that typically occurs in young children and can present with several distinct ocular symptoms. The presence of leukocoria indicates an abnormal reflection off the retina, which is often due to a tumor obstructing the light pathway. This abnormality is especially striking when the child is photographed with a flash, as the affected eye may appear white instead of the normal red reflex that is observed in healthy eyes.

In contrast, a red reflex seen in both eyes is a sign of healthy retinas, indicating that no obstruction exists. Strabismus, while a concerning finding in pediatric ophthalmology, can be due to various conditions and is not specific to retinoblastoma. Normal pupils would indicate a lack of any significant ocular pathology, which would not be the case in a child with retinoblastoma.