RESUMO
Retinoblastoma is an ocular malignancy that can put a patient's sight and, in some instances, life at risk. Here we report the case of a 2-year-old child who presented to her pediatrician with a 2-week history of left-sided leukocoria caused by retinoblastoma. Results of traditional office-based vision screening and automated vision screening, which often identify but are not specifically designed to detect rare diseases such as retinoblastoma, had been normal in the antecedent 7 months. She underwent enucleation of the left eye and has done well postoperatively. This case highlights the importance of assessing ocular media clarity by using red-reflex testing at multiple intervals during the preschool years, particularly in light of the recently published US Preventive Services Task Force guidelines for preschool vision screening, which gave an "insufficient evidence" level for vision screening in children younger than 3 years and failed to address red-reflex examination.