Tseng SC, et al. – In this present study, the physicians determine the prevalence and clinical characteristics of trigeminal–cervical (TC) ocular referred pain. They reveal that TC pain described here may be a different entity of ocular pain. It can indeed be distinguished from other ocular pain by the referral character so that one may avoid mislabeling it as undetermined or as a reason to unnecessarily overtreat concomitant ocular diseases.