Study cohort
Cancer
ADVERSE EVENTS, CANCER
We retrospectively reviewed the medical records of patients who participated in early phase clinical trials at the National Cancer Center Hospital (NCCH) (Tokyo, Japan) between January 2014 and August 2021. Early phase clinical trials which required an ophthalmologic examination according to their protocols before the start (for screening) and after completion (to confirm adverse events) of the administration of investigational drugs were included.