MSK will contact all families of 1-year survivors of unilateral retinoblastoma treated with enucleation or intra-arterial chemotherapy at MSK and TCH between 2006 or later for completion of validated questionnaires integrating the BASC-3 and PROMIS surveys. The survey may be administered in-person during clinic or by mail, based upon participant preference.

MSK will contact all families of 1-year survivors of unilateral retinoblastoma treated with enucleation or intra-arterial chemotherapy at MSK and TCH between 2006 or later for completion of validated questionnaires integrating the BASC-3 and PROMIS surveys. The survey may be administered in-person during clinic or by mail, based upon participant preference.

A comprehensive questionnaire, incorporating the BASC-3 and PROMIS measures, will be administered to parents of participants ages 8-17. The BASC-3 and PROMIS scales each have a parent and child version; these scales will be used to measure the secondary objective of parent and patient concordance rates for all participants ages 8 and older.

as measured by Behavior Assessment System for Children, 3rd edition, (BASC™-3;as measured by the BASC-3) Surveys have been normed on a representative sample that closely matches United States census population characteristics; T scores and percentiles in relation to general norms are calculated for each scale. The BASC-3 uses a T score metric where 50 is the mean for the population norm and the standard deviation is 10.

as measured by Behavior Assessment System for Children, 3rd edition, (BASC™-3; The following four T Scores will be analyzed for these BASC-3 summary scores (1) Externalizing Problems, (2) Internalizing Problems, (3) Behavior Symptoms Index and (4) Adaptive Skills. The "at-risk" category applies to any individual who scores 2 SD above the mean of 50, while "clinically significant" risk refers to those who score 3 SD above the mean. Additional scores are also provided which may be used to identify risk for more specific behavioral or emotional areas of concern.

as measured by the Patient Reported Outcomes Measurement Information System (PROMIS®) PROMIS measures use a T-score metric where 50 is the mean for the reference population and 10 is the standard deviation of that population. Higher scores correspond to a higher degree of symptom burden (for those items measuring symptoms) or a higher level of functioning (for physical functioning items)