At what age should I refer a child for specialist evaluation if I suspect retinoblastoma based on my clinical findings?

Refer any child of any age for specialist ophthalmological assessment if you suspect retinoblastoma based on clinical findings such as an absent fundal ('red') reflex. This referral should be made using a suspected cancer pathway referral without delay.

There is no specific age threshold; the guidance applies to children generally, reflecting the fact that retinoblastoma primarily affects young children.