An examination of the entire area of your child's eye while he is under a general anaesthetic. EUAs are used to monitor the state of the RB tumors in your child's eye(s). Once his eyes are mature (at around 6-7 years of age) EUAs can be replaced with eye exams in the Ophthalmology clinic. The child must be able to cooperate fully during the eye exam for it to be as effective as an EUA.